Diagnostic Trouble Codes (DTC) (Chevrolet Captiva 1)

Diagnostic Trouble Code (DTC) B357A, B357D

DTC Description

DTC B357A (01): Heating element control circuit (short circuit to battery voltage)

DTC B357A (02): Heating element control circuit (short circuit to ground)

DTC B357A (04): Heating element control circuit (chain break)

DTC B357A (54): Heating element control circuit (high temperature)

DTC B357D (01): Control circuit 2 heating element (short circuit to battery voltage)

DTC B357D (02): Control circuit 2 heating element (short circuit to ground)

DTC B357D (04): Control circuit 2 heating element (chain break)

DTC B357D (54): Control circuit 2 heating element (high temperature)

Description of circuits/systems

PTC heater (additional heater) - is an additional electric heater with three 330-watt sections, designed to warm the passenger area of the vehicle in low ambient temperatures. The engine control module (ECM) controls the supply of power to the PTC heater module by grounding the heater relay control circuit through an internal semiconductor device called a driver. When the ECM commands the PTC heater relay to turn on, the control circuit voltage should be low, close to 0 volts. When the ECM commands the PTC heater relay to turn off, the control circuit voltage potential should be high, close to battery voltage. If the ECM detects an inappropriate circuit condition, a DTC will set.

Conditions for Setting the DTC

B357A

PTC relay 1 on command given
The engine is running
Battery voltage is less than 16.5 V.

B357D

Command to turn on PTC relays 2 and 3 has been given
The engine is running
Battery voltage is less than 16.5 V.

Conditions for setting the fault code.

B357A(01) and B357D(01)

There is a short circuit to battery voltage in the PTC heater relay control circuit

B357A(02) and B357D(02)

There is a short circuit to ground in the PTC heater relay control circuit

B357A(04) and B357D(04)

There is a break in the PTC heater relay control circuit

B357A(54) and B357D(54)

There is a high temperature in the PTC heater relay control circuit

Actions to Take When a DTC Sets

DTCs B357A and B357B are Cnl type diagnostic trouble codes.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTCs B357A and B357D are Cnl type diagnostic trouble codes.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".
Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.

DTC B357A, B357D

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Disconnect the wiring harness connector from the PTC heater. Turn on the ignition with the engine off. Check the PTC heater supply voltage circuit with a test lamp connected to a good ground. Use the diagnostic tool to command the PTC heater relay on and off. Does the indicator light come on and go out according to each command?	-	Go to operation 3	Go to operation 4
3	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 4	Go to "Diagnostic Information"
4	Turn off the ignition. Disconnect the PTC heater relay. Turn on the ignition with the engine off. Check the PTC heater relay control circuit with a test lamp connected to the positive battery terminal Use the diagnostic tool to command the PTC heater to turn it on and off. Does the indicator light come on and go out when receiving on and off commands?	-	Go to operation 5	Go to operation 6
5	Connect a test lamp between the control circuit and the supply voltage circuit of the PTC heater relay. Use the diagnostic tool to command the PTC heater to turn it on and off. Does the indicator light come on and go out when receiving on and off commands?	-	Go to operation 7	Go to operation 9
6	Check the PTC heater relay control circuit for the following faults: Open circuit or increased resistance Short circuit to power supply Short to ground Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 8
7	Check the PTC heater relay for intermittent faults and poor contact. Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 10
8	Check for intermittent faults and loose connections at the ECM. Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 11
9	Eliminate open circuit, high resistance or short circuit to ground in the PTC heater relay supply voltage circuit. Is the renovation complete?	-	Go to operation 12	-
10	Replace PTC heater relay. Has the replacement been made?	-	Go to operation 12	-
11	Replace the ECM. Has the replacement been made?	-	Go to operation 12	-
12	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 13
13	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P0016

DTC Description

DTC P0016 (5A): Crankshaft Position (CKP) - Camshaft Position (CMP) Correlation (inconsistency)

Description of the scheme

The camshaft position (CMP) sensor is used to detect the position of the camshaft and also to analyze the relationship with the crankshaft position (CKP) so that the ECM can determine which cylinder injector to deliver fuel to at any given moment.

The ECM compares the position (rotation angle) camshaft with the position of the crankshaft. If the ECM controller detects a discrepancy between the target camshaft position and the crankshaft position, this diagnostic fault code is set.

Conditions for Setting the DTC

The ignition switch is in the on position.
Engine speed is greater than 50 rpm.
No Crankshaft Position Sensor (CKP) Errors

Conditions for setting the fault code.

The ECM detects that the offset between the camshaft and crankshaft corresponds to a distortion angle of between 24° and 32°.

Actions to Take When a DTC Sets

DTC P0016 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0016 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

Inspect the engine for recent engine mechanical repairs. An improperly installed camshaft, camshaft sensor, crankshaft sensor, or timing belt may cause this DTC to set.
For intermittent faults, See "Intermittent Fault Conditions".

DTC P0016

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 3	Go to Diagnostic Information
3	Check DTC data with a scan tool. Does the diagnostic tool display any diagnostic trouble codes indicating that the crankshaft position sensor and/or camshaft position sensor have also failed this ignition cycle?	-	Jump to the appropriate diagnostic trouble code table	Go to operation 4
4	Correct one of the following situations: To properly install the camshaft position (CMP) sensor To properly install the crankshaft position sensor (CKP) For timing belt tensioner malfunction If the timing belt is installed incorrectly. If there is excessive play in the timing belt. Is the renovation complete?	-	Go to operation 5	-
5	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for setting the DTC. You can also condition the vehicle to match the conditions that were observed from the Freeze Frame/Failure Records. DTC code showed misfire?	-	Go to operation 2	Go to operation 6
6	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code (DTC) P0045

DTC Description

DTC P0045 (01): Turbo Boost Solenoid Control Circuit (short circuit to battery voltage)

DTC P0045 (02): Turbo Boost Solenoid Control Circuit (short circuit to ground)

DTC P0045 (04): Turbo Boost Solenoid Control Circuit (chain break)

DTC P0045 (54): Turbo Boost Solenoid Control Circuit (high temperature)

Description of circuits/systems

The position of the turbocharger vanes is controlled by the engine control module (ECM). The ECM uses the turbocharger wastegate actuator to control the turbocharger vanes. When the engine is running without a load, the turbocharger vanes are in the open position, or no boost. When the engine is running under a load, the ECM commands the turbocharger regulator solenoid valve to close the turbocharger vanes, thereby increasing boost. The ECM varies the boost depending on the engine load requirements. The wastegate actuator uses 3 circuits: the supply voltage circuit, the control circuit, and the ground circuit. The ECM uses pulse width modulation in the control circuit to control the solenoid valve.

Conditions for Setting the DTC

P0045(01) and P0045(54)

Turbo boost solenoid energized
Battery voltage is less than 16.5 V.

P0045(02) and P0045(04)

Turbo boost solenoid off
Battery voltage is less than 16.5 V.

Conditions for setting the fault code.

P0045(01)

There is a short circuit to battery voltage in the turbo boost solenoid control circuit

P0045(02)

There is a short to ground in the turbo boost solenoid control circuit

P0045(04)

There is an open in the turbo boost solenoid control circuit

P0045(54)

There is an elevated temperature in the turbo boost solenoid control circuit

Actions to Take When a DTC Sets

DTC P0045 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0045 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".

DTC P0045

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Turn on the ignition with the engine off. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 3	Go to item "Intermittent Fault Conditions"
3	Turn off the ignition for 30 seconds. Disconnect the boost pressure control actuator connector. Connect a test lamp between the supply voltage circuit and the control circuit of the solenoid valve. Turn on the ignition with the engine off. In the diagnostic tool output controls, select the turbocharger boost pressure control actuator test. Send a command to set the turbocharger drive control parameter to 0%. Is the indicator light on?	-	Go to operation 8	Go to operation 4
4	Using the diagnostic tool, issue a command to set the turbocharger drive control parameter to 100%. Is the indicator light on?	-	Go to operation 6	Go to operation 5
5	Turn off the ignition for 30 seconds. Connect a test lamp between the battery voltage circuit and the solenoid valve control circuit. Turn on the ignition with the engine off. Using the diagnostic tool, issue a command to set the turbocharger drive control parameter to 100%. Is the indicator light on?	-	Go to operation 9	Go to operation 7
6	Turn off the ignition. Make sure that the power to the engine control system (ECM) controller is disconnected. Connect a test lamp between the supply voltage circuit and the drive ground circuit. Turn on the ignition with the engine off. Is the indicator light on?	-	Go to operation 11	Go to operation 10
7	Check the solenoid valve control circuit for the following conditions: Cliff Short circuit to power supply High resistance Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 12
8	Check the solenoid valve control circuit for a short to ground. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 12
9	Check the solenoid valve supply voltage circuit for an open circuit and high resistance. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 11
10	Check the solenoid valve ground circuit for open circuit and high resistance. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 11
11	Check the vane control solenoid valve for intermittent faults and connection reliability. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 13
12	Check the ECM for intermittent faults or poor connections. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 15
13	Inspect the turbocharger for clogging, damage or sticking. If necessary, replace the turbocharger. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 14
14	Note: The turbocharger boost pressure actuator is not replaceable. Replace the turbocharger assembly. Has the replacement been made?	-	Go to operation 16	-
15	Replace the ECM. Has the replacement been made?	-	Go to operation 16	-
16	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 17
17	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Codes P0069, P0105

DTC Description

DTC P0069 (5A): Manifold Absolute Pressure - Barometric Pressure Correlation (inconsistency)

DTC P0105 (03): Manifold Absolute Pressure (MAP) Sensor Circuit (voltage below threshold)

DTC P0105 (07): Manifold Absolute Pressure (MAP) Sensor Circuit (voltage above threshold)

DTC P0105 (5A): Manifold Absolute Pressure (MAP) Sensor Circuit (inconsistency)

Description of circuits/systems

The boost pressure sensor measures the pressure inside the intake manifold. Intake manifold pressure depends on turbocharger performance, engine speed, accelerator pedal input, air temperature, and barometric pressure (BARO). The diaphragm in the boost pressure sensor shifts depending on pressure changes caused by changing engine loads and operating conditions. The sensor converts this action into electrical resistance. The boost pressure sensor wiring includes 3 circuits. The electronic motor control system (ECM) controller supplies the sensor's 5-volt reference circuit with a stabilized voltage of 5 V. The electronic motor control system (ECM) controller provides a low-level reference circuit with a connection to the "ground". The boost pressure sensor supplies the ECM controller with a signal voltage associated with the pressure change via the boost pressure sensor signal circuit. The ECM controller converts the input signal voltage to a pressure value.

Conditions for Setting the DTC

P0069(5A) and P0105(5A)

The boost pressure sensor is OK
The atmospheric pressure sensor in the ECM is OK
The ignition switch is in the on position.
The engine is not working

P0105(03) and P0105(07)

ADC does not report an error in the module
The boost pressure sensor works without errors

Conditions for setting the fault code.

P0069(5A) and P0105(5A)

The difference between boost pressure and atmospheric pressure exceeds 200 GPa

P0105(03)

Boost Pressure Sensor Raw Signal Less Than 200mV

P0105(07)

Boost Pressure Sensor Raw Signal Greater Than 4897mV

Actions to Take When a DTC Sets

Diagnostic trouble codes P0069 and P0105 are Type E codes.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

Diagnostic trouble codes P0069 and P0105 are Type E codes.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".
Inspect the boost pressure sensor for improper wiring harness routing or for the wiring harness being too close to the following components:

electromagnetic valves,
relay and
electric motors.

Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.

DTC P0069 or P0105

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Use a diagnostic tool to check the raw signal from the boost pressure sensor. Is the signal below the specified value?	200 mV	Go to operation 4	Go to operation 3
3	Is the signal higher than the specified value?	4897 mV	Go to operation 6	Go to operation 4
4	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 5	Go to item "Intermittent Fault Conditions"
5	Use a diagnostic tool to monitor diagnostic trouble code (DTC) information. Does the scan tool indicate that DTC P0651(03) is also set?	-	Jump to the appropriate diagnostic trouble code table	Go to operation 7
6	Use a diagnostic tool to monitor diagnostic trouble code (DTC) information. Does the scan tool indicate that DTC P0651(07) is also set?	-	Go to operation 9	Go to operation 10
7	Turn off the ignition. Disconnect the boost pressure sensor electrical connector. Turn on the ignition with the engine off. Measure the voltage between the 5-volt reference circuit of the boost pressure sensor and a good ground using a digital multimeter (DMM). Is the voltage higher than the specified value?	4.8 V	Go to operation 8	Go to operation 12
8	Connect a 3-amp fused jumper wire between the 5-volt reference circuit and the boost pressure sensor signal circuit. Does the scan tool indicate that the signal is below the specified value?	4897 mV	Go to operation 16	Go to operation 13
9	Turn off the ignition. Disconnect the boost pressure sensor electrical connector. Turn on the ignition with the engine off. Does the scan tool indicate that the boost pressure sensor raw signal is below the specified value?	200 mV	Go to Diagnostic Trouble Code Table P0651(07)	Go to operation 14
10	Turn off the ignition. Disconnect the boost pressure sensor electrical connector. Turn on the ignition with the engine off. Does the scan tool indicate that the boost pressure sensor raw signal is below the specified value?	200 mV	Go to operation 11	Go to operation 14
11	Remove the boost pressure sensor. Connect a jumper wire between each terminal of the boost pressure sensor harness connector and the corresponding terminal of the boost pressure sensor. Measure the voltage between the boost pressure sensor low reference circuit and a good ground with a digital multimeter (DMM). Is the voltage higher than the specified value?	0.2 V	Go to operation 15	Go to operation 16
12	Check the 5-volt reference circuit of the boost pressure sensor for an open. Has the problem been detected and corrected?	-	Go to operation 20	Go to operation 17
13	Check the boost pressure sensor signal circuit for a short to ground or an open. Has the problem been detected and corrected?	-	Go to operation 20	Go to operation 17
14	Check the boost pressure sensor signal circuit for a short to voltage. Has the problem been detected and corrected?	-	Go to operation 20	Go to operation 19
15	Test the boost pressure sensor low reference circuit for a high resistance or an open. Has the problem been detected and corrected?	-	Go to operation 20	Go to operation 17
16	Inspect the boost pressure sensor for poor connections. Has the problem been detected and corrected?	-	Go to operation 20	Go to operation 18
17	Inspect the engine control module (ECM) for poor connections. Has the problem been detected and corrected?	-	Go to operation 20	Go to operation 19
18	Replace the boost pressure sensor. Has the replacement been made?	-	Go to operation 20	-
19	Replace the ECM. Has the replacement been made?	-	Go to operation 20	-
20	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 21
21	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Codes (DTC) P0087, P0088, P0089, P2293

DTC Description

DTC P0087 (00): Fuel Rail Pressure (FRP) Too Low

DTC P0087 (18): Fuel Rail Pressure (FRP) Too Low (signal amplitude below minimum)

DTC P0088 (00): Fuel Rail Pressure (FRP) Too High

DTC P0089 (00): Fuel Pressure Regulator Solenoid 1 Performance

DTC P0089 (11): Fuel Pressure Regulator Solenoid 1 Performance (above the maximum threshold)

DTC P0089 (12): Fuel Pressure Regulator Solenoid 1 Performance (below the minimum threshold)

DTC P0089 (18): Fuel Pressure Regulator Solenoid 1 Performance (signal amplitude below minimum)

DTC P0089 (19): Fuel Pressure Regulator Solenoid 1 Performance (signal amplitude is above maximum)

DTC P2293 (00): Fuel Pressure Regulator Solenoid 2 Performance

DTC P2293 (11): Fuel Pressure Regulator Solenoid 2 Performance (above the maximum threshold)

DTC P2293 (12): Fuel Pressure Regulator Solenoid 2 Performance (below the minimum threshold)

DTC P2293 (18): Fuel Pressure Regulator Solenoid 2 Performance (signal amplitude below minimum)

DTC P2293 (19): Fuel Pressure Regulator Solenoid 2 Performance (signal amplitude is above maximum)

Description of circuits/systems

The Engine Control Module (ECM) achieves the desired fuel rail pressure by regulating the fuel pump flow. The ECM monitors the fuel rail pressure (FRP) using the FRP sensor. If the pressure measured by the sensor differs from the desired fuel rail pressure plus any excess due to transients, the ECM sets a DTC.

Conditions for Setting the DTC

The engine is running

Conditions for setting the fault code.

P0087(00)

The ECM detects that the fuel rail pressure is below the minimum threshold when the pressure is regulated by both the fuel rail pressure regulator and the metering valve

P0087(18)

The specified fuel rail pressure value is not reached

P0088(00)

The ECM detects that the fuel rail pressure is above the maximum threshold when the pressure is regulated by both the fuel rail pressure regulator and the metering valve

P0089(11)

The ECM detects that the fuel rail pressure is above the maximum threshold when the pressure is controlled by the metering device

P0089(12)

The ECM detects that the fuel rail pressure is below the minimum threshold when the pressure is controlled by the metering valve

P0089(18)

The set value of the volumetric fuel flow through the metering device and the positive deviation are greater than the value corresponding to the fuel consumption

P0089(19)

The set value of the volumetric fuel flow through the metering device and the negative deviation are less than the value corresponding to the fuel consumption

P2293(00)

The positive deviation of the fuel rail pressure exceeds the current set value

P2293(11)

The ECM detects that the fuel rail pressure is above the maximum threshold when the pressure is regulated by the pressure regulator

P2293(12)

The ECM detects that the fuel rail pressure is below the minimum threshold when the pressure is regulated by the pressure regulator

P2293(18)

The set value of fuel rail pressure exceeds the threshold and the positive deviation is above the maximum threshold

P2293(19)

Negative deviation of fuel rail pressure below minimum threshold

Actions to Take When a DTC Sets

DTCs P0087, P0088, P0089(00), P0089(11), P0089(12), and P2293(00) are Type A DTCs.
DTCs P0089(18), P2293(11), P2293(12), P2293(18), and P2293(19) are Type E DTCs.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTCs P0087, P0088, P0089(00), P0089(11), P0089(12), and P2293(00) are Type A DTCs.
DTCs P0089(18), P2293(11), P2293(12), P2293(18), and P2293(19) are Type E DTCs.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

The cause of these DTCs may be a restriction in the cross-section of the fuel supply line, a leak in the high-pressure section, too much or too much fuel in the low-pressure line. If the ambient temperature is below 0°C (32°F), the fuel pickup screen may be covered with ice formed from water present in the fuel tank.
FRP regulator malfunctions do not cause any driving problems unless there are DTCs. One of the reasons for the occurrence of DTCs can be a "sticking" FRP regulator.
If the fuel system pressure is really high, detonation and engine smoking will occur.

DTC P0087, P0088, P0089, P2293

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Start the engine. Subject the vehicle to the conditions that cause the DTC to set. You can also subject the vehicle to the conditions that were observed from the Freeze Frame/Failure Records. DTC code showed misfire?	-	Go to operation 3	Go to the "Diagnostic information" section
3	Are there any DTCs other than these?	-	Jump to the appropriate diagnostic trouble code table	Go to operation 4
4	Check the fuel pressure regulator (FRP) control circuit for the following conditions: Short circuit to battery voltage Short circuit with "ground" Breakup Check the fuel pressure regulator (FRP) supply voltage circuit for the following conditions: Short circuit with "ground" Breakup Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 5
5	Check the fuel metering control circuit for the following faults: Short circuit to battery voltage Short circuit with "ground" Breakup Check the fuel dispenser supply voltage circuit for the following faults: Short circuit with "ground" Breakup Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 6
6	Perform the "Fuel Pump Electrical Circuit Diagnosis" procedure in the "System Diagnosis" section. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 7
7	Are DTCs P0087(00), P0087(18), P0089(00), P0089(12), P0089(18), P2293(00), P2293(12), P2293(18) set?	-	Go to operation 9	Go to operation 8
8	Are DTCs P0088(00), P0089(11), P0089(19), P2293(11), P2293(19) set?	-	Go to operation 10	-
9	Check the fuel system for the following problems: Leak in high pressure section Injector stuck in open position Fuel injection pump wear Wear of injectors Fuel Rail Pressure (FRP) Regulator Leak Low pressure in the electric fuel pump Clogged fuel filter Leak in the fuel line between the electric fuel pump and the fuel injection pump Has the problem been detected and corrected?	-	Go to operation 11	Go to the "Diagnostic information" section
10	Check the fuel system for the following problems: Fuel dispenser stuck in open position Fuel Rail Pressure (FRP) Regulator Stuck in Closed Position High return pressure due to clogged zero flow injector throttle valve Electrical fault in fuel dispenser (permanently off) Electrical fault in fuel rail pressure (FRP) regulator (always on) Has the problem been detected and corrected?	-	Go to operation 11	Go to the "Diagnostic information" section
11	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 12
12	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic trouble code DTC P0090

DTC Description

DTC P0090 (01): Fuel Pressure Regulator Solenoid 1 Control Circuit (short circuit to battery voltage)

DTC P0090 (02): Fuel Pressure Regulator Solenoid 1 Control Circuit (short circuit to ground)

DTC P0090 (04): Fuel Pressure Regulator Solenoid 1 Control Circuit (chain break)

DTC P0090 (54): Fuel Pressure Regulator Solenoid 1 Control Circuit (high temperature)

Description of circuits/systems

The high-pressure fuel injection pump metering unit is controlled by open-loop current. Low-frequency pulse-width modulated current is supplied to the metering unit control mechanism via the power stage. As a result, the mechanism is constantly in motion, eliminating static friction. Since the electrical resistance of the metering unit winding depends on temperature, the current through the winding is measured and the current regulator compensates for resistance changes.

This is done using the so-called component signal shaper of the dispenser. The component shaper performs the following functions:

Measuring the actual current of the dispenser and monitoring the analog channel
Current regulation
Output of control pulse-width voltage to the dispenser and control of power stage errors

The engine control module (ECM) supplies power and ground to the fuel metering solenoid valve. The ECM monitors the current in the circuits to detect errors.

Conditions for Setting the DTC

P0090(01) and P0090(54)

The command to turn on the dispenser has been given
Battery voltage is less than 16.5 V.

P0090(02) and P0090(04)

The command to turn off the dispenser has been given
Battery voltage is less than 16.5 V.

Conditions for setting the fault code.

P0090(01)

There is a short circuit to battery voltage in the control circuit of the dispenser

P0090(02)

There is a short circuit to battery voltage in the control circuit of the dispenser

P0090(04)

There is a break in the control circuit of the dispenser

P0090(54)

There is a high temperature in the control circuit of the dispenser

Actions to Take When a DTC Sets

DTC P0090 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0090 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

DTC P0090

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Try to start the engine. Does the engine start?	-	Go to operation 4	Go to operation 3
3	Turn off the ignition. Disconnect the engine control module (ECM) connectors. Disconnect the fuel metering solenoid connector. Measure the electrical resistance between the fuel metering solenoid control circuit and ground using a digital multimeter. Is the measured resistance equal to the specified value?	?	Go to operation 12	Go to operation 9
4	Turn off the ignition. Disconnect the fuel metering solenoid wiring harness connector. Turn on the ignition with the engine off. Check the fuel metering solenoid supply voltage circuit with a test light connected to a good ground. Is the indicator light on?	-	Go to operation 5	Go to operation 7
5	Turn off the ignition. Make sure the fuel metering solenoid harness connector is disconnected. Turn on the ignition with the engine off. Using a test light connected to the positive battery terminal, check the fuel metering solenoid control circuit. Is the indicator light on?	-	Go to operation 10	Go to operation 6
6	Disconnect the ECM connector that contains the fuel metering solenoid control circuit. Turn on the ignition with the engine off. Measure the voltage between the fuel metering solenoid control circuit and a good ground with a digital multimeter. Is the measured voltage equal to the specified value?	0 B	Go to operation 13	Go to operation 8
7	Check for an open in the power supply circuit between the ECM and the fuel metering solenoid. If a problem is detected, take steps to eliminate it. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 14
8	Repair short to battery voltage in the control circuit between the ECM and the fuel metering solenoid. Is the renovation complete?	-	Go to operation 16	-
9	Check for a short to ground in the control circuit between the ECM and the fuel metering solenoid. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 15
10	Test the ignition voltage circuits, fuel metering solenoid circuit, and fuel metering solenoid supply voltage circuit for high resistance. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 11
11	Check for intermittent faults and unreliable connections of the fuel metering solenoid. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 12
12	Note: The fuel metering solenoid is not replaceable. Replace the fuel injection pump. Has the replacement been made?	-	Go to operation 16	-
13	Check for an open in the control circuit between the ECM and the fuel metering solenoid. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 14
14	Check the reliability of the ECM connections. If necessary, troubleshoot the wiring. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 15
15	Replace the ECM. Has the replacement been made?	-	Go to operation 16	-
16	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 17
17	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P0095

DTC Description

DTC P0095 (03): Intake Air Temperature (IAT) Sensor 2 Circuit (voltage below threshold)

DTC P0095 (07): Intake Air Temperature (IAT) Sensor 2 Circuit (voltage above threshold)

Description of circuits/systems

The intake air temperature (IAT) sensor 2 is a variable resistor. The IAT sensor 2 has a signal circuit and a low reference circuit. The IAT sensor 2 measures the temperature of the air entering the intake system. The engine control module (ECM) supplies 5 volts to the IAT signal circuit and provides a ground for the IAT low reference circuit. When the air is cold, the resistance of the sensor is high. As the air temperature rises, the resistance of the sensor decreases. When the resistance of the sensor increases, the ECM detects high voltage on the IAT signal circuit. When the resistance of the sensor decreases, the ECM detects low voltage on the IAT signal circuit.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P0095(03)

Intake Air Temperature Sensor (IAT2) Raw Signal Voltage Less Than 156mV

P0095(07)

Intake Air Temperature Sensor (IAT2) Raw Signal Voltage Greater Than 4946 mV

Actions to Take When a DTC Sets

DTC P0095 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0095 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".
Inspect the T-MAP sensor for improperly routed wiring harness or wiring harness that is too close to the following components:

electromagnetic valves,
relay and
electric motors.

Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.
After the engine has completely cooled down, the IAT Sensor, IAT Sensor 2, and ECT Sensor parameters on the scan tool should be within 8°C (15°F) of each other and of the ambient air temperature.

DTC P0095

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 3	Go to item "Intermittent Fault Conditions"
3	Use a diagnostic tool to check the IAT Sensor 2 parameter. IAT Sensor 2 below specified value?	156 mV	Go to operation 4	Go to operation 5
4	Check the IAT sensor 2 signal circuit for a short to ground. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 5
5	Install a 3-amp fused jumper wire between the IAT sensor 2 signal circuit and the low reference circuit. Turn on the ignition. Check the IAT sensor 2 parameter of the diagnostic tool. Is the parameter higher than the specified value?	4946 mV	Go to operation 6	Go to operation 7
6	Check the IAT sensor 2 signal circuit for a short to voltage, open, or high resistance. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 7
7	Turn off the ignition. Wait long enough for the ECM power to turn off. Disconnect the wiring harness connector at IAT Sensor 2. Measure the resistance between the IAT sensor 2 low reference circuit and ground. Is the resistance higher than the specified value?	10 Ohm	Go to operation 8	Go to operation 10
8	Test the IAT sensor 2 low reference circuit for an open or high resistance. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 9
9	Replace IAT sensor 2. Has the replacement been made?	-	Go to operation 11	-
10	Replace the ECM. Has the replacement been made?	-	Go to operation 11	-
11	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 12
12	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P0100

DTC Description

DTC P0100 (00): Mass Air Flow (MAF) Sensor Circuit

DTC P0100 (09): Mass Air Flow (MAF) Sensor Circuit (rate of change above threshold)

DTC P0100 (0A): Mass Air Flow (MAF) Sensor Circuit (rate of change below threshold)

DTC P0100 (26): Mass Air Flow (MAF) Sensor Circuit (too low frequency)

DTC P0100 (27): Mass Air Flow (MAF) Sensor Circuit (too high frequency)

Description of circuits/systems

The mass air flow sensor measures the amount of air passing through the sensor per unit of time. The engine control module (ECM) uses this information to determine the engine operating mode to adjust fuel delivery. The ECM calculates the engine's fuel requirement by monitoring the current flowing through the signal wire from the mass air flow sensor.

To measure air flow, a sensor with a membrane is used, which is heated by a resistor located in the center of the membrane. The temperature distribution on the membrane is measured using four thermistors located symmetrically relative to the heating resistor. The air flow passing by the sensor changes the temperature distribution on the membrane. As a result, the difference in electrical resistance of the thermistors located upstream and downstream relative to the central heated zone changes. The difference in resistance depends on the direction and magnitude of the air flow. Thus, the MAF sensor simultaneously measures the mass flow and the direction of the air flow.

The measuring element also includes a temperature sensor that measures the temperature of the intake air. The sensor signal to the ECM varies in frequency. The frequency of the mass air flow sensor signal provides information on the mass air flow. The temperature signal is a pulsed signal with pulse width modulation. The frequency of the pulse width modulated temperature signal is used as a reference for the frequency modulated signal of the mass air flow. Corrections are introduced into the mass air flow signal at the moment of switching on, as well as corrections for pulsations caused by the influence of the air ducts.

Conditions for Setting the DTC

The battery voltage is greater than 8.5 V.
The ignition switch is in the on position.
Engine speed ranges from 1000 to 4000 rpm.

Conditions for setting the fault code.

P0100(00)

There is a short to battery voltage or a short to ground in the MAF sensor circuit

P0100(09)

The ECM detects that the mass air flow (MAF) sensor raw signal period is less than 0.071 ms

P0100(0A)

The ECM detects that the mass air flow (MAF) sensor raw signal period is less than 0.833 ms

P0100(26)

The ECM detects that the calculated period of the mass air flow (MAF) sensor signal is less than 0.083 ms

P0100(27)

The ECM detects that the calculated period of the mass air flow (MAF) sensor raw signal is greater than 0.667 ms

Actions to Take When a DTC Sets

DTC P0100 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0100 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".
Inspect the MAF sensor for improper wiring harness routing and check to see if the wiring harness is too close to the following components:

electromagnetic valves,
relay and
electric motors.

Low minimum air flow may cause a DTC to set when braking. Check the following:

clogged or crushed air intake duct, dirty air filter element,
blockage of the MAF sensor intake grille, and
sticking or dirty throttle valve or throttle bore.

Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.

DTC P0100

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Turn off the ignition for 30 seconds. Operate the vehicle under conditions that cause the DTC to appear. Using the diagnostic tool, select the DTC display function. Did the DTC code indicate a malfunction of this ignition?	-	Go to operation 3	See "Diagnostic Tools"
3	Check for the following faults: Engine vacuum leak Air leak in intake duct after MAF sensor Clogged or kinked air intake duct MAF sensor intake grille clogged The air filter capacity has been reduced. Engine oil dipstick not inserted in place Loose or missing engine oil filler cap Excessive oil level in the crankcase Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 4
4	Disconnect the MAF sensor wiring connector. Connect a test lamp between the MAF sensor signal voltage circuit and the ECM housing. Turn on the ignition, do not start the engine. Is the indicator light on?	-	Go to operation 5	Go to operation 9
5	Turn off the ignition. Make sure the MAF sensor wiring connector is disconnected. Turn on the ignition, do not start the engine. Using a digital multimeter, measure the voltage on the signal circuit of the mass air flow sensor. Is the voltage within the set value?	4.8 - 5.2 V	Go to operation 6	Go to operation 7
6	Turn off the ignition. Remove F27 from the instrument panel fuse box. Using a digital multimeter, measure the electrical resistance between the low reference circuit of the MAF sensor and the ECM housing. Note: After completing the test, return the fuse to the instrument panel fuse box. Is the resistance below the specified value?	5 Ohm	Go to operation 10	Go to operation 8
7	Test the MAF sensor signal circuit for high resistance, short to ground, or short to battery voltage. Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 11
8	Test the MAF sensor low reference circuit for a high resistance or open. Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 11
9	Repair high resistance or open in the MAF sensor low reference circuit. Is the renovation finished?	-	Go to operation 12	-
10	Replace the mass air flow sensor. Is the renovation finished?	-	Go to operation 12	-
11	Replace the ECM. Is the renovation finished?	-	Go to operation 12	-
12	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 13
13	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code (DTC) P0101

DTC Description

DTC P0101 (11): Mass Air Flow (MAF) Sensor Performance (above the maximum threshold)

DTC P0101 (12): Mass Air Flow (MAF) Sensor Performance (below the minimum threshold)

Description of circuits/systems

The Mass Air Flow Sensor (MAF) measures the amount of air entering the engine. The ECM controller, based on the MAF sensor signal, provides the fuel supply level necessary to minimize harmful emissions. The ECM controller adjusts the fuel supply based on the MAF sensor signal until the required air flow rate is reached. An ignition voltage circuit, a signal circuit, and a low-voltage reference circuit are connected to the MAF sensor. The MAF sensor generates an output voltage that depends on the air flow rate flowing through the air supply system. The ECM controller calculates the predicted mass air flow rate. The ECM controller compares the actual signal of the mass air flow sensor with the predicted mass air flow value. As a result of comparison, it may be found that the signal is fixed at some level or is too small or too large for these operating conditions. If the ECM controller detects that the actual signal of the MAF sensor is not within certain limits of the calculated mass air flow rate, a diagnostic fault code is set.

Conditions for Setting the DTC

The car is not loaded
The battery voltage is greater than 8.5 V.
The ignition switch is in the on position.

Conditions for setting the fault code.

P0101(11)

Mass fraction of air is greater than thresholds

P0101(12)

The mass fraction of air is less than the thresholds

Actions to Take When a DTC Sets

DTC P0101 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0101 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".
This diagnostic trouble code may be set by unmeasured air entering downstream of the MAF sensor.
A short between the MAF sensor signal circuit and the intake air temperature (IAT) sensor signal circuit will cause the MAF sensor signal to be higher than normal at idle and lower than normal at high air flow.
A faulty MAF sensor can cause engine emissions to be elevated.

DTC P0101

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 3	See "Diagnostic Tools"
3	Turn off the ignition. Turn on the ignition with the engine off. Use a diagnostic tool to check the MAF sensor parameter. Is the MAF sensor greater than the specified value?	0 g/s	Go to operation 6	Go to operation 4
4	Turn off the ignition. Check the following components for air leaks: Air intake system and turbocharging system Charge air cooler Mass Air Flow Sensor/Intake Air Temperature Sensor O-Ring Boost Pressure Sensor Seal Missing or damaged exhaust gas recirculation (EGR) valve gasket Missing or damaged throttle body gasket Check the following: Cracks in the MAF sensor housing Clogged air intake duct or dirty air filter element Contamination blocking the mass air flow sensor measuring wires Water entering the air intake system Installing the MAF sensor in reverse orientation Stuck exhaust gas recirculation valve Clogged exhaust system Mechanical or electrical fault in the throttle actuator control system Has the problem been detected and corrected?	-	Go to operation 17	Go to operation 5
5	Turn on the ignition with the engine off. Check BARO and pressure sensor parameters using a diagnostic tool. Is the difference between the sensors equal to or less than the specified value?	5 kPa	Go to operation 7	Go to diagnostic trouble code P0069 (5A)
6	Check the MAF sensor signal circuit for the following conditions: Short circuit to voltage Short circuit with "ground" Breakup High resistance Short circuit to other circuits Has the problem been detected and corrected?	-	Go to operation 17	Go to operation 7
7	Start the engine and let it idle. Use a diagnostic tool to check the MAF sensor parameter. Move the wiring harness and MAF/IAT sensor connector. Does moving the harness or connector affect the MAF sensor parameter?	-	Go to operation 14	Go to operation 8
8	Turn off the engine. Turn on the ignition with the engine off. Measure the battery voltage with a digital multimeter. Disconnect the MAF/IAT sensor. Connect a test light between the MAF sensor ignition voltage circuit 1 and a good ground. Connect a digital multimeter to the test light probe and a reliable ground source. Does the measured voltage differ from the specified value by no more than 1.5 V?	B+	Go to operation 9	Go to operation 13
9	Important: All electrical components and additional devices must be switched off. Before proceeding, turn off the ignition for 60 seconds to allow the control modules to power down. Measure the resistance between the MAF sensor low reference circuit and a good ground using a digital multimeter. Is the resistance below the specified value?	5 Ohm	Go to operation 11	Go to operation 10
10	Disconnect the engine control module (ECM). Test the MAF sensor low reference circuit for the following conditions: High resistance Intermittent chain break Has the problem been detected and corrected?	-	Go to operation 17	Go to operation 12
11	Check for a short circuit between the terminals and for an unstable or poor contact at the MAF/IAT sensor. Has the problem been detected and corrected?	-	Go to operation 17	Go to operation 15
12	Check for a short circuit between the terminals and for unstable or poor contact at the ECM controller. Has the problem been detected and corrected?	-	Go to operation 17	Go to operation 16
13	Repair high resistance or intermittent open circuit in MAF sensor ignition voltage circuit. Is the renovation complete?	-	Go to operation 17	-
14	Repair wire harnesses or connectors if necessary. Is the renovation complete?	-	Go to operation 17	-
15	Replace MAF/IAT sensor. Has the replacement been made?	-	Go to operation 17	-
16	Replace the ECM. Has the replacement been made?	-	Go to operation 17	-
17	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 18
18	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P0110

DTC Description

DTC P0110 (00) Intake Air Temperature Sensor Circuit

DTC P0110 (09): Intake Air Temperature (IAT) Sensor Circuit (rate of change above threshold)

DTC P0110 (0A): Intake Air Temperature (IAT) Sensor Circuit (rate of change below threshold)

DTC P0110 (11): Intake Air Temperature (IAT) Sensor Circuit (above the maximum threshold)

DTC P0110 (12): Intake Air Temperature (IAT) Sensor Circuit (below the minimum threshold)

Description of circuits/systems

The intake air temperature (IAT) sensor 1 is a variable resistor. The IAT sensor has a signal circuit and a low reference circuit. The IAT sensor measures the temperature of the air entering the engine. The engine control module (ECM) supplies 5 volts to the IAT signal circuit and provides a ground for the IAT low reference circuit. When the IAT sensor is cold, the resistance of the sensor is high. As the air temperature rises, the resistance of the sensor decreases. When the resistance of the sensor increases, the ECM detects high voltage on the IAT signal circuit. When the resistance of the sensor decreases, the ECM detects low voltage on the IAT signal circuit.

Conditions for Setting the DTC

The battery voltage is greater than 8.5 V.
The ignition switch is in the on position.

Conditions for setting the fault code.

P0110(00)

There is a short to battery voltage or a short to ground in the MAF sensor circuit

P0110(11)

The duty cycle of the intake air temperature sensor signal is greater than 90%

P0110(12)

The duty cycle of the intake air temperature sensor signal is less than 10%

P0110(53)

The ECM detects that the IAT1 sensor temperature signal is less than -40°C

P0110(9)

IAT 1 signal period is less than 40 ms

P0110(A)

IAT 1 signal period is greater than 60 ms

Actions to Take When a DTC Sets

DTC P0110 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0110 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".
Inspect the MAF/IAT sensor for improperly routed wire harness and check if the wire harness is too close to the following components:

electromagnetic valves,
relay and
electric motors.

Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.
After the engine has completely cooled down, the IAT Sensor, IAT Sensor 2, and ECT Sensor parameters on the scan tool should be within 8°C (15°F) of each other and of the ambient air temperature.

DTC P0110

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 3	Go to item "Intermittent faults".
3	Use a diagnostic tool to check the IAT Sensor 1 parameter. IAT Sensor 1 Is Below Specified Value?	10 %	Go to operation 4	Go to operation 5
4	Check the IAT sensor 1 signal circuit for a short to ground. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 5
5	Install a 3A fused jumper wire between the IAT Sensor 1 signal circuit and the low reference circuit. Turn on the ignition. Check IAT sensor parameter 1 using a diagnostic tool. Is the parameter higher than the specified value?	90 %	Go to operation 6	Go to operation 7
6	Check the IAT sensor 1 signal circuit for a short to voltage, open, or high resistance. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 7
7	Turn off the ignition. Wait long enough for the ECM power to turn off. Disconnect the wiring harness connector at IAT Sensor 1. Measure the resistance between the IAT sensor 1 low reference circuit and ground. Is the resistance higher than the specified value?	10 Ohm	Go to operation 8	Go to operation 10
8	Test the IAT sensor 1 low reference circuit for an open or high resistance. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 9
9	Replace IAT sensor 1. Has the replacement been made?	-	Go to operation 11	-
10	Replace the ECM. Has the replacement been made?	-	Go to operation 11	-
11	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 12
12	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P0115

DTC Description

DTC P0115 (03): Engine Coolant Temperature (ECT) Sensor Circuit (voltage below threshold)

DTC P0115 (07): Engine Coolant Temperature (ECT) Sensor Circuit (voltage above threshold)

Description of circuits/systems

The engine coolant temperature (ECT) sensor is a variable resistance that measures the temperature of the engine coolant. The engine control module (ECM) supplies 5 volts to the ECT sensor signal circuit and grounds the ECT sensor low reference circuit. When the ECT sensor is cold, the resistance of the sensor is high. As the temperature of the ECT sensor increases, the resistance of the sensor decreases. When the resistance of the sensor is high, the ECM detects high voltage on the ECT signal circuit. When the resistance of the sensor is low, the ECM detects low voltage on the ECT signal circuit.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P0115(03)

ECT sensor raw signal voltage below 117 mV

P0115(07)

ECT sensor raw signal voltage is greater than 4956 mV

Actions to Take When a DTC Sets

DTC P0115 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0115 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".
Inspect the ECT sensor for improper wiring harness routing and check to see if the wiring harness is too close to the following components:

electromagnetic valves,
relay and
electric motors.

Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.
After the engine has completely cooled down, the IAT Sensor, IAT Sensor 2, and ECT Sensor parameters on the scan tool should be within 8°C (15°F) of each other and of the ambient air temperature.

DTC P0115

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 3	Go to item "Intermittent faults".
3	Check the ECT sensor parameters with a scanning device. Is the ECT sensor below the specified value?	117 mV	Go to operation 4	Go to operation 5
4	Check the ECT sensor signal circuit for a short to ground. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 5
5	Install a 3A fused jumper wire between the ECT sensor signal circuit and the low reference circuit. Turn on the ignition. Check the ECT sensor parameter of the diagnostic tool. Is the parameter higher than the specified value?	4956 mV	Go to operation 6	Go to operation 7
6	Check the ECT sensor signal circuit for a short to voltage, open, or high resistance. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 7
7	Turn off the ignition. Wait long enough for the ECM power to turn off. Disconnect the wiring harness connector at the ECT sensor. Measure the resistance between the ECT sensor low reference circuit and ground. Is the resistance higher than the specified value?	10 Ohm	Go to operation 8	Go to operation 10
8	Test the ECT sensor low reference circuit for an open or high resistance. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 9
9	Replace ECT sensor. Has the replacement been made?	-	Go to operation 11	-
10	Replace the ECM. Has the replacement been made?	-	Go to operation 11	-
11	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 12
12	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code (DTC) P0116

DTC Description

DTC P0116 (00): Engine Coolant Temperature (ECT) Sensor Performance

Description of circuits/systems

The engine control module (ECM) uses this diagnostic information to determine if the engine coolant temperature has reached the minimum calibrated thermostat setting temperature. The ECM supplies 5 V to the ECT sensor signal circuit and grounds the ECT sensor low reference circuit. The ECM monitors the coolant temperature using the ECT sensor signal. The ECM calculates the amount of fuel used since startup and determines if the vehicle is being operated under conditions that would allow the engine coolant to warm up normally to the thermostat setting range. If the coolant temperature does not increase as expected or does not reach the thermostat setting range, it is determined that the engine is not warm enough to operate stably in low emissions mode. Other diagnostics that use engine coolant temperature as a prerequisite may also not function as expected.

Conditions for Setting the DTC

The engine coolant temperature sensor has no faults
Engine speed is greater than 1000 rpm

Conditions for setting the fault code.

The engine coolant temperature does not reach the minimum threshold within the set time after starting

Actions to Take When a DTC Sets

DTC P0116 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0116 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

DTC P0116 may be caused by the ECT sensor signal level shifting downwards.
If an intermittent fault is suspected, See "Intermittent Fault Conditions".

DTC P0116

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Check the cooling system and coolant level. Has the problem been detected and corrected?	-	Go to operation 14	Go to operation 3
3	Perform the following steps: Test and check the thermostat for proper operation and temperature range. Has the problem been detected and corrected?	-	Go to operation 14	Go to operation 4
4	Disconnect the coolant temperature (ECT) sensor. Check the following: Corrosion of ECT sensor terminals Incorrectly connected or corroded ECT sensor harness connector terminals Bent or broken ECT harness connector pins Has the problem been detected and corrected?	-	Go to operation 14	Go to operation 5
5	Check for intermittent faults and loose connections at the ECM. Has the problem been detected and corrected?	-	Go to operation 14	Go to operation 6
6	Measure the electrical resistance of the engine coolant temperature sensor signal circuit between the sensor and the ECM using a digital multimeter. Is the resistance within the required range?	0 - 10 Ohm	Go to operation 7	Go to operation 10
7	Measure the electrical resistance of the engine coolant temperature sensor low reference circuit between the sensor and the ECM using a digital multimeter. Is the resistance within the required range?	0 - 10 Ohm	Go to operation 8	Go to operation 11
8	Turn off the ignition. Remove the coolant temperature sensor. Place the sensor on a work surface away from heat sources. Leave the sensor for 30-60 minutes to allow its temperature to equalize with the ambient temperature. Measure the ambient temperature using an accurate thermometer and record it. Important: Do not handle the ECT sensor by the probe. Measure the resistance of the ECT sensor and record the measured value. Compare the measured resistance of the ECT sensor with the ambient temperature using the resistance-temperature dependence table. See resistance-temperature dependences. Is the measured resistance value of the ECT sensor within the specified range?	-	Go to operation 9	Go to operation 12
9	Install the ECT sensor. Is the work finished?	-	Go to operation 13	-
10	Correct high resistance in ECT sensor signal circuit. Is the renovation complete?	-	Go to operation 14	-
11	Correct high resistance in ECT sensor low reference circuit. Is the renovation complete?	-	Go to operation 14	-
12	Replace ECT sensor. Has the replacement been made?	-	Go to operation 14	-
13	Replace the ECM. Has the replacement been made?	-	Go to operation 14	-
14	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 15
15	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P0180

DTC Description

DTC P0180 (03): Fuel Temperature Sensor Circuit (voltage below threshold)

DTC P0180 (07): Fuel Temperature Sensor Circuit (voltage above threshold)

Description of circuits/systems

The fuel temperature sensor is a variable resistor. The engine control module (ECM) supplies a 5-volt reference voltage to the fuel temperature sensor through the signal circuit and also supplies a low reference voltage to the sensor. When the fuel temperature sensor is cold, the resistance is high. The fuel temperature sensor signal voltage is close to the supplied voltage at low temperatures and decreases as the sensor warms up. The control module monitors the fuel temperature sensor signal circuit and uses its signal to calculate the temperature of the fuel entering the engine.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P0180(03)

Fuel Temperature Sensor Raw Signal Voltage Below 127mV

P0180(07)

Fuel Temperature Sensor Raw Signal Voltage is Greater Than 4946 mV

Actions to Take When a DTC Sets

DTC P0180 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0180 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".
Inspect the fuel temperature sensor for improper wiring harness routing and check to see if the wiring harness is too close to the following components:

electromagnetic valves,
relay and
electric motors.

Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.

DTC P0180

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 3	Go to item "Intermittent faults".
3	Use a diagnostic tool to check the fuel temperature sensor parameter. Is the fuel temperature sensor parameter below the specified value?	127 mV	Go to operation 4	Go to operation 5
4	Check the fuel temperature sensor signal circuit for a short to ground. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 5
5	Install a 3A fused jumper wire between the fuel temperature sensor signal circuit and the low reference circuit. Turn on the ignition. Check the fuel temperature sensor parameter using the diagnostic tool. Is the parameter higher than the specified value?	4946 mV	Go to operation 6	Go to operation 7
6	Check the fuel temperature sensor signal circuit for a short to voltage, open circuit, or high resistance. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 7
7	Turn off the ignition. Wait long enough for the ECM power to turn off. Disconnect the wiring harness connector at the fuel temperature sensor. Measure the resistance between the low reference circuit of the fuel temperature sensor and ground. Is the resistance higher than the specified value?	10 Ohm	Go to operation 8	Go to operation 10
8	Test the fuel temperature sensor low reference circuit for an open or high resistance. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 9
9	Replace the fuel temperature sensor. Has the replacement been made?	-	Go to operation 11	-
10	Replace the ECM. Has the replacement been made?	-	Go to operation 11	-
11	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 12
12	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Codes P0190, P0191

DTC Description

DTC P0190 (03): Fuel Rail Pressure (FRP) Sensor Circuit (voltage below threshold)

DTC P0190 (07): Fuel Rail Pressure (FRP) Sensor Circuit (voltage above threshold)

DTC P0191 (11): Fuel Rail Pressure (FRP) Sensor Performance (above the maximum threshold)

DTC P0191 (12): Fuel Rail Pressure (FRP) Sensor Performance (below the minimum threshold)

Description of circuits/systems

The fuel rail pressure (FRP) sensor has a 5-volt reference circuit, a signal circuit, and a low reference circuit. The ECM monitors the voltages on the FRP sensor circuits. When the fuel pressure is high, the signal voltage is high. When the fuel pressure is low, the signal voltage is low. The fuel pressure regulator has a solenoid supply voltage circuit and a solenoid control circuit. The ECM controls the fuel pressure regulator, which regulates the delivery of high-pressure fuel to the fuel injector manifolds and injectors.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P0190(03)

Fuel Rail Pressure (FRP) Sensor Raw Signal Voltage Below 254 mV

P0190(07)

Fuel Rail Pressure (FRP) Sensor Raw Signal Voltage Greater Than 4751 mV

P0191(11)

When the engine is started, the ECM detects a fuel rail pressure (FRP) sensor raw voltage greater than 718 mV for greater than 20 ms, OR
During power lock, the ECM detects a fuel rail pressure (FRP) sensor raw voltage greater than 718 mV for greater than 100 ms

P0191(12)

When the engine is started, the ECM detects a fuel rail pressure (FRP) sensor raw voltage of less than 459 mV for more than 20 ms, OR
During power lock, the ECM detects a fuel rail pressure (FRP) sensor raw voltage of less than 459 mV for greater than 100 ms

Actions to Take When a DTC Sets

DTC P0190 is a Type A diagnostic trouble code.
DTC P0191 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0190 is a Type A diagnostic trouble code.
DTC P0191 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".
Inspect the fuel rail pressure sensor for improper wiring harness routing and check to see if the wiring harness is too close to the following components:

electromagnetic valves,
relay and
electric motors.

Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.

DTC P0190 or P0191

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 3	Go to item "Intermittent faults".
3	Turn on the ignition, do not start the engine. Disconnect the fuel rail pressure sensor connector. Observe the current fuel rail pressure parameter using a scanning device. Is the parameter equal to the specified value?	0 MPa	Go to operation 5	Go to operation 4
4	Turn on the ignition, do not start the engine. Make sure the fuel rail pressure sensor connector is disconnected. Observe the current fuel rail pressure parameter using a scanning device. Is the parameter equal to the specified value?	200 MPa	Go to operation 12	Go to operation 6
5	Check the fuel rail sensor signal circuit for a short to ground. Has the problem been detected and corrected?	-	Go to operation 13	Go to operation 6
6	Turn on the ignition, do not start the engine. Disconnect the fuel rail pressure sensor connector. Check the signal circuit with a test lamp connected to ground. Is the indicator light on?	-	Go to operation 7	Go to operation 8
7	Check the fuel rail pressure sensor signal circuit for a short to battery voltage. Has the problem been detected and corrected?	-	Go to operation 14	Go to operation 13
8	Using a digital multimeter, measure the electrical resistance between the 5V reference circuit of the fuel rail pressure sensor and ground. Is the measured voltage within the specified range?	0.254 - 4.75 V	Go to operation 10	Go to operation 9
9	Check the 5V reference voltage circuit of the fuel rail pressure sensor for an open circuit. Has the problem been detected and corrected?	-	Go to operation 14	Go to operation 13
10	Connect a fused jumper wire between the fuel rail pressure sensor signal circuit and the low reference circuit. Observe the current fuel rail pressure parameter using a scanning device. Does the parameter match the specified value?	0 MPa	Go to operation 12	Go to operation 11
11	Check the signal circuit and the low reference circuit of the fuel rail pressure sensor for an open. Has the problem been detected and corrected?	-	Go to operation 14	Go to operation 13
12	Replace the fuel rail pressure sensor. Has the replacement been made?	-	Go to operation 14	-
13	Replace the ECM. Has the replacement been made?	-	Go to operation 14	-
14	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 15
15	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic trouble code P0201, P0202, P0203, P0204, P1224, P1227, P122A, P1233, P2146, P2149

DTC Description

DTC P0201 (04): Injector 1 control circuit (chain break)

DTC P0202 (04): Injector 2 control circuit (chain break)

DTC P0203 (04): Injector 3 control circuit (chain break)

DTC P0204 (04): Injector 4 control circuit (chain break)

DTC P1224 (00): Injector 1 control circuit - short circuit

DTC P1224 (01): Injector 1 control circuit - short circuit (short circuit to battery voltage)

DTC P1227 (00): Injector 2 control circuit - short circuit

DTC P1227 (01): Injector 2 control circuit - short circuit (short circuit to battery voltage)

DTC P122A (00): Injector 3 control circuit - short circuit

DTC P122A (01): Injector 3 control circuit - short circuit (short circuit to battery voltage)

DTC P1233 (00): Injector 4 control circuit - short circuit

DTC P1233 (01): Injector 4 control circuit - short circuit (short circuit to battery voltage)

DTC P2146 (00):: Positive voltage circuit for injector control, group 1

DTC P2146 (F0):: Positive voltage circuit for injector control, group 1 (unidentified short circuit)

DTC P2149 (00):: Positive voltage circuit for injector control, group 2

DTC P2149 (F0):: Positive voltage circuit for injector control, group 2 (unidentified short circuit)

Description of circuits/systems

The engine control module (ECM) supplies voltage to the fuel injectors through the positive injector control circuits. The ECM supplies ground to each fuel injector through the low reference circuit. The ECM monitors the status of the positive injector control circuits and the low reference circuits.

Conditions for Setting the DTC

The engine is running

Conditions for setting the fault code.

P0201(04), P0202(04), P0203(04) and P0204(04)

There is a break in the injector circuits

P1224(00), P1227(00), P122A(00) and P1233(00)

There is an unidentified error in the injector circuits

P1224(01), P1227(01), P122A(01) and P1233(01)

There is an unidentified short circuit in the injector circuits

P2146(00) and P2149(00)

There is an unidentified error in the injector block inside the ECM

P2146(F0) and P2149(F0)

There is an unidentified short circuit in the injector block inside the ECM

Actions to Take When a DTC Sets

DTCs P0201, P0202, P0203, P0204, P1224, P1227, P122A, P1233, P2146, and P2149 are Type A DTCs.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTCs P0201, P0202, P0203, P0204, P1224, P1227, P122A, P1233, P2146, and P2149 are Type A DTCs.

Cm. "Diagnostic Trouble Code Definitions"

DTC P0201, P0202, P0203, P0204, P1224, P1227, P122A, P1233, P2146, P2149

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Turn off the ignition. Disconnect the wiring harness connector from the ECM. Turn on the ignition. Measure the voltage between the injector control circuit and a good ground. Is the voltage less than the specified value?	0.3 V	Go to operation 3	Go to operation 10
3	Turn off the ignition. Measure the resistance between the injector control circuit and a good ground connection. Is the resistance higher than the specified value?	500 kOhm	Go to operation 4	Go to operation 5
4	Disconnect the wiring harness connector from the injector. Make sure the wiring harness connector at the ECM is disconnected. Measure the electrical resistance between the injector control circuit and the low reference circuit. Is the resistance higher than the specified value?	500 kOhm	Go to operation 7	Go to operation 11
5	Disconnect the wiring harness connector from the injector. Make sure the wiring harness connector at the ECM is disconnected. Measure the resistance between the injector control circuit and a good ground connection. Is the resistance higher than the specified value?	500 kOhm	Go to operation 6	Go to operation 14
6	Measure the resistance between the injector control circuit and the low reference circuit. Is the resistance higher than the specified value?	500 kOhm	Go to operation 16	Go to operation 15
7	Measure the resistance of the injector control circuit between the harness connectors at the ECM and at the injector. Is the resistance below the specified value?	5 Ohm	Go to operation 8	Go to operation 12
8	Measure the resistance of the injector low reference circuit between the harness connectors at the ECM and at the injector. Is the resistance below the specified value?	5 Ohm	Go to operation 9	Go to operation 13
9	Visually inspect the fuel injector and connecting lines. Has the problem been detected and corrected?	-	Go to operation 18	Go to operation 17
10	Repair short to battery voltage in injector control circuit and/or low reference circuit. Is the renovation complete?	-	Go to operation 18	-
11	Repair short circuit in harness between injector control circuit and low reference circuit. Is the renovation complete?	-	Go to operation 18	-
12	Eliminate high resistance in the injector control circuit. Is the renovation complete?	-	Go to operation 18	-
13	Correct high resistance in injector low reference circuit. Is the renovation complete?	-	Go to operation 18	-
14	Repair short circuit to battery voltage in injector control circuit. Is the renovation complete?	-	Go to operation 18	-
15	Repair short to battery voltage in injector low voltage reference circuit. Is the renovation complete?	-	Go to operation 18	-
16	Replace the fuel injector. Has the replacement been made?	-	Go to operation 18	-
17	Replace the ECM. Has the replacement been made?	-	Go to operation 18	-
18	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 19
19	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Codes P0234, P0299

DTC Description

DTC P0234 (00): Excessive boost pressure

DTC P0299 (00): Insufficient boost pressure

Description of circuits/systems

The boost pressure sensor measures the pressure inside the intake manifold. Intake manifold pressure depends on turbocharger performance, engine speed, accelerator pedal input, air temperature, and barometric pressure (BARO). The diaphragm in the boost pressure sensor shifts depending on pressure changes caused by changing engine loads and operating conditions. The sensor converts this action into electrical resistance. The boost pressure sensor wiring includes 3 circuits. The electronic motor control system (ECM) controller supplies the sensor's 5-volt reference circuit with a stabilized voltage of 5 V. The electronic motor control system (ECM) controller provides a low-level reference circuit with a connection to the "ground". The boost pressure sensor supplies the ECM controller with a pressure-related signal voltage via the boost pressure sensor signal circuit. The ECM controller converts the input signal voltage to a pressure value. Under normal operating conditions, the lowest pressure that can be present in the intake manifold is equal to the barometric pressure (BARO). This happens when the vehicle is idling or when the ignition is switched on when the engine is turned off. The highest pressure occurs with increased turbocharger performance.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P0234(00)

The ECM detects that the actual boost pressure is below the tolerance limit of the desired boost pressure

P0299(00)

The ECM detects that the actual boost pressure is greater than the tolerance limit from the desired boost pressure

Actions to Take When a DTC Sets

Diagnostic trouble codes P0234 and P0299 are Type E codes.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

Diagnostic trouble codes P0234 and P0299 are Type E codes.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".
Inspect the boost pressure sensor for improper wiring harness routing or for the wiring harness being too close to the following components:

electromagnetic valves,
relay and
electric motors.

Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.
Using a scan tool, with the engine idling, check the boost pressure sensor parameters kPa (kPa) and BARO (barometric pressure). Boost pressure and BARO values should be within 1-10 kPa of each other.
Using the diagnostic device, when the engine is idling, check the boost pressure sensor parameter kPa (kPa), while slowly increasing the engine speed from idle to 3000 rpm, then slowly return the engine to idle. The boost pressure parameter must remain approximately or exactly equal to the value of BARO at idle speed and gradually increase as the engine speed increases, then return to the value of BARO when the engine speed returns to idle speed.

DTC P0234, P0299

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Use a scan tool to check the diagnostic trouble code (DTC) information. Does the scan tool indicate that other diagnostic trouble codes are also set?	-	Jump to the appropriate diagnostic trouble code table	Go to operation 3
3	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 4	Go to item "Intermittent Fault Conditions"
4	Using the diagnostic device, when the engine is idling, check the boost pressure sensor parameter kPa (kPa), while slowly increasing the engine speed from idle to 3000 rpm, then slowly return the engine to idle. Does the boost pressure setting remain approximately or exactly equal to the BARO value at idle speed and increase smoothly as engine speed increases, then return to the BARO value when engine speed returns to idle speed?	-	Go to operation 7	Go to operation 5
5	Check the charge air cooler for the following faults: Some components are damaged Loose or incorrect installation Wet or clogged air filter Exhaust gas leak before turbocharger Exhaust gas outlet restrictions after turbocharger Leaks in the charge air cooler Has the problem been detected and corrected?	-	Go to operation 8	Go to operation 6
6	Inspect the turbocharger for the following conditions: Clogging Damage Turbocharger blades sticking Turbocharger Oil Supply Has the problem been detected and corrected?	-	Go to operation 8	Go to operation 7
7	Replace the boost pressure sensor. Has the replacement been made?	-	Go to operation 8	-
8	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 9
9	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Codes P0263, P0266, P0269, P0272

DTC Description

DTC P0263 (11): Cylinder Balancing System 1 (above the maximum threshold)

DTC P0263 (12): Cylinder Balancing System 1 (below the maximum threshold)

DTC P0266 (11): Cylinder Balancing System 2 (above the maximum threshold)

DTC P0266 (12): Cylinder Balancing System 2 (below the maximum threshold)

DTC P0269 (11): Cylinder Balancing System 3 (above the maximum threshold)

DTC P0269 (12): Cylinder Balancing System 3 (below the maximum threshold)

DTC P0272 (11): Cylinder Balancing System 4 (above the maximum threshold)

DTC P0272 (12): Cylinder Balancing System 4 (below the maximum threshold)

Description of circuits/systems

The ECM has the ability to increase and decrease the amount of fuel delivered to each cylinder to ensure smooth idle operation. If the corrective fuel amount exceeds certain limits, a DTC will set.

Conditions for Setting the DTC

The engine is running
The gearbox is set to a gear higher than 3rd

Conditions for setting the fault code.

P0263(11), P0266(11), P0269(11) and P0272(11)

ZFC value exceeds upper limit

P0263(12), P0266(12), P0269(12) and P0272(12)

ZFC value is below the lower limit

Actions to Take When a DTC Sets

Diagnostic trouble codes DTCs P0263, P0266, P0269, and P0272 are Cnl type codes.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

Diagnostic trouble codes DTCs P0263, P0266, P0269, and P0272 are Cnl type codes.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

To confirm problems related to a faulty cylinder, the injector balance test on the scan tool should be used. It is possible that if a cylinder balance fault is detected and the engine is then run for an extended period of time, the ECM will attempt to increase or decrease fuel delivery to other cylinders to compensate for the rough idle. The scan tool's snapshot mode can be used to correctly identify the suspect cylinder. The most likely cause of cylinder balance related DTCs is a faulty injector or a mechanical problem with the engine (low compression ratio).

DTC P0263, P0266, P0269, P0272

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Turn on the ignition with the engine off. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 3	Go to item "Intermittent Fault Conditions"
3	Check DTC data with a scan tool. Does the scan tool indicate that other diagnostic trouble codes are also set?	-	Jump to the appropriate diagnostic trouble code table	Go to operation 4
4	Check for the following basic engine mechanical or fuel delivery problems in that cylinder. Low compression ratio Injection nozzles malfunction Bends or kinks in injection lines Has the problem been detected and corrected?	-	Go to operation 6	Go to operation 5
5	Replace the fuel injection pump. Has the replacement been made?	-	Go to operation 6	-
6	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 7
7	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Codes P02E0, P02E1

DTC Description

DTC P02E0 (01): Air Intake Control Valve Control Circuit (short circuit to battery voltage)

DTC P02E0 (02): Air Intake Control Valve Control Circuit (short circuit to ground)

DTC P02E0 (04): Air Intake Control Valve Control Circuit (chain break)

DTC P02E0 (54): Air Intake Control Valve Control Circuit (high temperature)

DTC P02E1 (11): Air Intake Control Valve Control Circuit Performance (above the maximum threshold)

DTC P02E1 (12): Air Intake Control Valve Control Circuit Performance (below the minimum threshold)

Description of circuits/systems

To maintain a high degree of exhaust gas recirculation, a throttle control (TAC) system is used. It increases the pressure difference between the exhaust and intake, ensuring that the required amount of exhaust gases are mixed with the intake air.

The ECM controller transmits the value of the desired throttle angular position to the throttle control module (TAC) as a pulse-width modulated signal. The TAC module drives a DC electric motor that controls the throttle position based on the pulse-width modulated input signal. Setting the throttle valve to the desired position is provided by an internal feedback circuit with a potentiometer, which does not require external position control by the ECM controller.

Conditions for Setting the DTC

P02E0(01) and P02E0(54)

Throttle actuator activation command given
The ignition switch is in the on position.
Battery voltage is less than 16.5 V.

P02E0(02) and P02E0(04)

Throttle actuator off command given
The ignition switch is in the on position.
Battery voltage is less than 16.5 V.

P02E1(11) and P02E1(12)

The ignition switch is in the on position.

Conditions for setting the fault code.

P02E0(01)

There is a short circuit to battery voltage in the throttle actuator control circuit

P02E0(02)

There is a short circuit to battery voltage in the throttle actuator control circuit

P02E0(04)

There is an open in the throttle actuator control circuit

P02E0(54)

There is a high temperature in the throttle control circuit

P02E1(11)

The ECM detects that the airflow deviation during regeneration indicates excessive EGR flow

P02E1(12)

The ECM detects that the air flow deviation during regeneration indicates insufficient EGR flow

Actions to Take When a DTC Sets

DTC P02E0 is a Type E diagnostic trouble code.
DTC P02E1 is a Type A diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P02E0 is a Type E diagnostic trouble code.
DTC P02E1 is a Type A diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".

DTC P02E0, P02E1

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Turn on the ignition with the engine off. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 3	Go to item "Intermittent Fault Conditions"
3	Turn off the ignition for 30 seconds. Disconnect the wiring harness connector from the TAC module. Connect a test lamp between the supply voltage circuit and the control circuit of the TAC module. Turn on the ignition with the engine off. Select Throttle Actuator Test from the scan tool Output Control menu. Send a command to set the throttle actuator control parameter to 0%. Is the indicator light on?	-	Go to operation 8	Go to operation 4
4	Using the diagnostic tool, command the throttle actuator control parameter to be set to 100%. Is the indicator light on?	-	Go to operation 6	Go to operation 5
5	Turn off the ignition for 30 seconds. Connect a test lamp between the battery voltage circuit and the TAC module control circuit. Turn on the ignition with the engine off. Using the diagnostic tool, command the throttle actuator control parameter to 100%. Is the indicator light on?	-	Go to operation 9	Go to operation 7
6	Turn off the ignition. Make sure that the power to the engine control system (ECM) controller is disconnected. Connect a test lamp between the supply voltage circuit and the ground circuit of the TAC module. Turn on the ignition with the engine off. Is the indicator light on?	-	Go to operation 11	Go to operation 10
7	Check the TAC module control circuit for the following faults: Cliff Short circuit to power supply High resistance. Has the problem been detected and corrected?	-	Go to operation 15	Go to operation 12
8	Check the TAC module control circuit for a short to ground. Has the problem been detected and corrected?	-	Go to operation 15	Go to operation 12
9	Check the TAC module supply voltage circuit for an open or high resistance. Has the problem been detected and corrected?	-	Go to operation 15	Go to operation 11
10	Check the TAC module ground circuit for an open or high resistance. Has the problem been detected and corrected?	-	Go to operation 15	Go to operation 11
11	Check the TAC module for intermittent faults and unreliable connections. Has the problem been detected and corrected?	-	Go to operation 15	Go to operation 13
12	Check the ECM for intermittent faults or poor connections. Has the problem been detected and corrected?	-	Go to operation 15	Go to operation 14
13	Replace the TAC module. Has the replacement been made?	-	Go to operation 15	-
14	Replace the ECM. Has the replacement been made?	-	Go to operation 15	-
15	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 16
16	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P0335

DTC Description

DTC P0335 (28): Crankshaft Position Sensor (CKP) Circuit (incorrect frequency)

DTC P0335 (29): Crankshaft Position Sensor (CKP) Circuit (too few pulses)

Description of circuits/systems

The crankshaft position (CKP) sensor produces an alternating voltage of varying amplitude and frequency depending on the crankshaft speed. The CKP sensor works in conjunction with a 58X pulse generator attached to the crankshaft. The pulse generator teeth are spaced at 6-degree intervals, except for one that is spaced at 12 degrees. The ECM uses the 12-degree interval to determine top dead center for cylinders 1 and 4. The ECM determines when cylinder 1 is on its compression stroke by monitoring the CKP sensor and the camshaft position (CMP) sensors.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P0335(28)

The ECM detects an invalid crankshaft position signal

P0335(29)

The ECM detects that there is no crankshaft position signal

Actions to Take When a DTC Sets

DTC P0335 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0335 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

If an intermittent fault is suspected, See "Intermittent Fault Conditions".

Description of the test

The number below refers to the step numbers from the diagnostic table.

This step allows you to determine whether the state is current.
This step allows you to check the internal condition within the CKP sensor.
This step allows you to test the ability of the CKP sensor to generate a signal.
The ECM supplies 2.5 volts to the CKP sensor circuit. If the voltage is out of range, it indicates a fault condition in the circuit or the ECM.
The ECM supplies 2.5 volts to the CKP sensor circuit. If the voltage is out of range, it indicates a fault condition in the circuit or the ECM.
This step allows you to check for mutual closure of the signal circuit and the low-level reference circuit of the CKP sensor. If a digital universal measuring device (DMM) shows electrical conductivity, then the circuits are closed to each other.

DTC P0335

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Important: The diagnostic fault code of the CKP sensor can be set due to a non-permanent malfunction of the camshaft position sensor (CMP) circuits. If you save any CMP sensor fault codes, please refer to the corresponding table of diagnostic fault codes. Try to start the engine. Check DTC data with a scan tool. Engine won't start or DTC shows misfire?	-	Go to operation 4	Go to operation 3
3	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 4	Go to Diagnostic Information
4	Turn off the ignition. Disconnect the crankshaft position sensor (CSP). Measure the resistance between the CKP sensor terminals using a digital multimeter (DMM). Is the resistance within the required range?	860±10% Ohm	Go to operation 5	Go to operation 11
5	Connect a digital multimeter (DMM) between the CKP sensor terminals. Switch the digital multimeter to measure AC voltage. Turn the engine crankshaft. Observe the digital multimeter (DMM) while cranking the crankshaft. When turning the crankshaft, is the voltage higher than the specified value?	1.3 VAC	Go to operation 6	Go to operation 14
6	Turn on the ignition with the engine off. Measure the voltage between the CKP sensor signal circuit and a good ground using a digital multimeter (DMM). Is the voltage within the specified range?	2 - 3 V	Go to operation 7	Go to operation 9
7	Measure the voltage between the CKP sensor low reference circuit and a good ground using a digital multimeter (DMM). Is the voltage within the specified range?	2 - 3 V	Go to operation 8	Go to operation 10
8	Turn off the ignition. Disconnect the engine control module (ECM). Measure the resistance between the CKP sensor signal circuit and the CKP sensor low reference circuit at the ECM harness connector. Digital Multimeter (DMM) displays OL?	-	Go to operation 13	Go to operation 15
9	Check the CKP sensor signal circuit for an open, short to ground, or short to voltage. Has the problem been detected and corrected?	-	Go to operation 18	Go to operation 12
10	Test the CKP sensor low reference circuit for an open, short to ground, or short to voltage. Has the problem been detected and corrected?	-	Go to operation 18	Go to operation 12
11	Check the CKP sensor for intermittent faults and connection reliability. Has the problem been detected and corrected?	-	Go to operation 18	Go to operation 16
12	Check the ECM for intermittent faults or poor connections. Has the problem been detected and corrected?	-	Go to operation 18	Go to operation 17
13	Check the CKP sensor for intermittent faults and connection reliability. Has the problem been detected and corrected?	-	Go to operation 18	Go to operation 17
14	Turn off the engine. Inspect the CKP sensor for proper installation. Make sure the CKP sensor fasteners are tightened to the specified value. Has the problem been detected and corrected?	5 - 8 Nm	Go to operation 18	Go to operation 16
15	Repair short between CKP sensor signal circuit and CKP sensor low reference circuit. Is the renovation complete?	-	Go to operation 18	-
16	Replace the crankshaft position sensor. Has the replacement been made?	-	Go to operation 18	-
17	Replace the ECM. Has the replacement been made?	-	Go to operation 18	-
18	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 19
19	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P0340

DTC Description

DTC P0340 (28): Camshaft Position (CMP) Sensor Circuit (incorrect frequency)

DTC P0340 (29): Camshaft Position (CMP) Sensor Circuit (too few pulses)

Description of circuits/systems

The camshaft position (CMP) sensor is a Hall effect sensor that produces a pulse for each revolution of the camshaft. The CMP sensor output is pulse width coded. The engine control module (ECM) uses the output pulses from the CMP and crankshaft position (CKP) sensors to determine engine speed and position. The CMP sensor is connected to battery voltage and the ECM via the following circuits:

Power supply voltage circuit
Signal chain
Low level reference chain

Conditions for Setting the DTC

The ignition switch is in the on position.
Engine speed is greater than 50 rpm.
No camshaft position (CMP) sensor errors

Conditions for setting the fault code.

P0340(28)

The ECM detects an invalid camshaft position signal

P0340(29)

The ECM detects that the camshaft position signal is missing

Actions to Take When a DTC Sets

DTC P0340 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0340 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

If an intermittent fault is suspected, See "Intermittent Fault Conditions".
If the CMP sensor signal is lost during operation, the engine will run normally. If the CMP sensor signal is missing during startup, the engine will not start.

DTC P0340

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 3	Go to Diagnostic Information
3	Inspect all circuits to the camshaft position (CMP) sensor for the following conditions: Routed too close to wiring or fuel injection components Routed too close to electrical equipment installed after the vehicle was sold Routed too close to solenoids, relays and electric motors If incorrect routing is detected, correct the wiring harness routing. Is the inspection complete?	-	Go to operation 4	-
4	Inspect the CMP sensor supply voltage circuit for the following conditions: Cliff Short to ground High resistance Has the problem been detected and corrected?	-	Go to operation 10	Go to operation 5
5	Inspect the CMP sensor signal circuit for the following conditions: Cliff Short to ground Short circuit to power supply High resistance. Has the problem been detected and corrected?	-	Go to operation 10	Go to operation 6
6	Inspect the CMP sensor low reference circuit for the following conditions: Cliff Short circuit to power supply High resistance. Has the problem been detected and corrected?	-	Go to operation 10	Go to operation 7
7	Inspect the CMP sensor and pulse sensor for physical damage. Has the problem been detected and corrected?	-	Go to operation 10	Go to operation 8
8	Replace the camshaft position sensor. Use a diagnostic tool to clear DTC codes. Test drive the vehicle under the conditions that caused this DTC to set. DTC code showed misfire?	-	Go to operation 9	Go to operation 11
9	Replace the ECM. Has the replacement been made?	-	Go to operation 10	-
10	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 11
11	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Codes (DTC) P0401, P0402, P0403

DTC Description

DTC P0401 (00): Exhaust gas recirculation, insufficient flow

DTC P0402 (00): Exhaust gas recirculation, flow too high

DTC P0403 (01): Exhaust Gas Recirculation Solenoid Valve Control Circuit (short circuit to battery voltage)

DTC P0403 (02): Exhaust Gas Recirculation Solenoid Valve Control Circuit (short circuit to ground)

DTC P0403 (04): Exhaust Gas Recirculation Solenoid Valve Control Circuit (chain break)

DTC P0403 (54): Exhaust Gas Recirculation Solenoid Valve Control Circuit (high temperature)

Description of circuits/systems

Exhaust gas recirculation is used to reduce nitrogen oxide (NOx) emissions caused by high combustion temperatures. It does this by feeding a small amount of exhaust gas back into the combustion chamber. By combining the air-fuel mixture with the exhaust gas, the combustion temperature is lowered.

The engine control module (ECM) actuates a solenoid that controls the EGR backpressure valve. In the normal position, the solenoid is closed. By connecting a ground to the solenoid, the ECM supplies current to the solenoid, which in turn opens the vacuum supply to the EGR valve.

Conditions for Setting the DTC

P0401(00) and P0402(00)

The ignition switch is in the on position.

P0403(01) and P0403(54)

Exhaust gas recirculation solenoid energized
Battery voltage is not higher than 16.5 V.
The ignition switch is in the on position.

P0403(02) and P0403(04)

EGR solenoid is disabled
Battery voltage is not higher than 16.5 V.
The ignition switch is in the on position.

Conditions for setting the fault code.

P0401(00)

The ECM controller detects that the deviation of the air flow during the operation of the exhaust gas recirculation system indicates that the exhaust gas recirculation flow rate is insufficient

P0402(00)

The ECM controller detects that the deviation of the air flow during the operation of the exhaust gas recirculation system indicates an excessive exhaust gas recirculation flow rate

P0403(01)

There is a short circuit to battery voltage in the EGR solenoid control circuit

P0403(02)

There is a short to ground in the EGR solenoid control circuit

P0403(04)

There is an open in the EGR solenoid control circuit

P0403(54)

There is a high temperature in the EGR solenoid control circuit

Actions to Take When a DTC Sets

DTCs P0401, P0402, and P0403 are Type E codes.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTCs P0401, P0402, and P0403 are Type E codes.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".
Inspect the sensor for improper wiring harness routing and check to see if the wiring harness is too close to the following components:

electromagnetic valves,
relay and
electric motors.

Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.

DTC P0401, P0402, P0403

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Note: Before replacing a blown fuse, make sure that the problem that caused the fuse to blow has been corrected. Check the correct operation of fuse EF11 in the engine fuse box. Has the problem been detected and corrected?	-	Go to operation 14	Go to operation 3
3	Perform a visual inspection of the following elements: Air intake/boost hoses for leaks Connected hoses and tubes for kinks, damage, etc. Hose clamps in the air intake/boost system for proper installation Vacuum supply system for leaks or blockages Charge air cooler for leaks Air filter for contamination and correct installation Mass Air Flow (MAF) Sensor for Pollution Exhaust system/turbocharger Throttle actuator Has the problem been detected and corrected?	-	Go to operation 14	Go to operation 4
4	Turn off the ignition. Disconnect the wiring harness connector from the EGR solenoid. Turn on the ignition. Using a digital multimeter, measure the voltage between the EGR solenoid supply voltage circuit and a good ground. Is the voltage higher than the specified value?	11 B	Go to operation 5	Go to operation 6
5	Turn off the ignition. Disconnect the wiring harness connector from the ECM. Turn on the ignition. Using a digital multimeter, measure the voltage between the EGR solenoid control circuit and a good ground. Is the voltage less than the specified value?	0.3 V	Go to operation 7	Go to operation 9
6	Check the EGR solenoid supply voltage circuit for an open or high resistance. Has the problem been detected and corrected?	-	Go to operation 14	-
7	Turn off the ignition. Measure the resistance between the EGR solenoid control circuit and a good ground. Is the resistance higher than the specified value?	500 kOhm	Go to operation 8	Go to operation 10
8	Measure the resistance of the EGR solenoid control circuit between the connectors on the ECM and the solenoid. Is the resistance below the specified value?	5 Ohm	Go to operation 12	Go to operation 11
9	Eliminate a battery voltage short circuit in the control circuit of the exhaust gas recirculation solenoid. Is the renovation complete?	-	Go to operation 14	-
10	Eliminate a ground short circuit in the control circuit of the exhaust gas recirculation solenoid. Is the renovation complete?	-	Go to operation 14	-
11	Correct high resistance in EGR solenoid control circuit. Is the renovation complete?	-	Go to operation 14	-
12	Replace the EGR solenoid valve. Use a diagnostic tool to clear DTC codes. Test drive the vehicle under the conditions that caused this DTC to set. Is the DTC code cleared?	-	Go to operation 13	Go to operation 15
13	Replace the ECM. Has the replacement been made?	-	Go to operation 14	-
14	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 15
15	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Codes (DTC) P0460, P2065, P2636

DTC Description

DTC P0460 (03): Fuel Level Sensor 1 Circuit (voltage below threshold)

DTC P0460 (07): Fuel Level Sensor 1 Circuit (voltage above threshold)

DTC P2065 (03): Fuel Level Sensor 2 Circuit (voltage below threshold)

DTC P2065 (07): Fuel Level Sensor 2 Circuit (voltage above threshold)

DTC P2636 (58): Insufficient fuel transfer pump flow (incorrect reaction after an event)

Description of circuits/systems

The resistance of the primary and secondary fuel level sensors changes depending on the fuel level. The engine control module (ECM) monitors the primary and secondary fuel level sensor signal circuits and determines the fuel level. When the fuel tank is full, the resistance of both fuel level sensors is high and the ECM receives high voltage signals on the primary and secondary fuel level sensor signal circuits. When the fuel tank is empty, the resistance of the fuel level sensors is low and the ECM receives low voltage signals. The ECM measures the voltages on the primary and secondary fuel level sensor signal circuits and calculates the remaining fuel level in the tanks. The ECM sends the fuel level information to the instrument cluster, causing the fuel level indicator to light.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P0460(03)

Fuel level sensor 1 raw signal voltage is less than 200 mV

P0460(07)

Fuel Level Sensor 1 Source Signal Voltage is Greater Than 4198 mV

P2065(03)

Fuel level sensor 2 raw signal voltage is less than 200 mV

P2065(07)

Fuel level sensor 2 raw signal voltage is greater than 3998 mV

P2636(58)

The ECM detects that fuel level sensor 1 is indicating a fuel level above the high limit and fuel level sensor 2 is indicating a fuel level below the low limit

Actions to Take When a DTC Sets

DTCs P0460, P2065 and P2636 are Cnl type codes.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTCs P0460, P2065 and P2636 are Cnl type codes.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".
Inspect the sensor for improper wiring harness routing and check to see if the wiring harness is too close to the following components:

electromagnetic valves,
relay and
electric motors.

Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.

DTC P0460, P2065, P2636

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Note: Before replacing a blown fuse, make sure that the problem that caused the fuse to blow has been corrected. Check the correct operation of fuse F9 in the engine fuse box. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 3
3	Turn off the ignition. Disconnect the wiring harness connector from the fuel level sensor. Turn on the ignition. Using a digital multimeter, measure the voltage between the fuel level sensor supply voltage circuit and a reliable ground. Is the voltage equal to the specified value?	B+	Go to operation 4	Go to operation 7
4	Turn on the ignition. Using a diagnostic tool, check the fuel level sensor parameter. Is the parameter within the specified range?	0.2 - 4.1 V	Go to operation 5	Go to operation 6
5	Perform a visual inspection of the following elements: Fuel intake hose for clogging or leakage Fuel intake hose connections for correct connection Fuel pump for proper operation Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 9
6	Check the fuel level sensor signal circuit for the following faults: Short circuit to voltage Short circuit with "ground" Breakup High resistance Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 8
7	Check the fuel level sensor supply voltage circuit for an open or high resistance. Has the problem been detected and corrected?	-	Go to operation 11	Go to Diagnostic Information
8	Test the fuel level sensor low reference circuit for the following conditions: Short circuit to voltage Breakup High resistance Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 9
9	Replace the fuel level sensor. Clear the DTC using a scan tool. Operate the vehicle under conditions that cause the DTC to appear. DTC code showed misfire?	-	Go to operation 10	Go to operation 11
10	Replace the ECM. Has the replacement been made?	-	Go to operation 11	-
11	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 12
12	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Codes (DTC) P0480, P0481

DTC Description

DTC P0480 (01): Cooling Fan Relay 1 Control Circuit (short circuit to battery voltage)

DTC P0480 (02): Cooling Fan Relay 1 Control Circuit (short circuit to ground)

DTC P0480 (04): Cooling Fan Relay 1 Control Circuit (chain break)

DTC P0480 (54): Cooling Fan Relay 1 Control Circuit (high temperature)

DTC P0481 (01): Cooling Fan Relay 2 Control Circuit (short circuit to battery voltage)

DTC P0481 (02): Cooling Fan Relay 2 Control Circuit (short circuit to ground)

DTC P0481 (04): Cooling Fan Relay 2 Control Circuit (chain break)

DTC P0481 (54): Cooling Fan Relay 2 Control Circuit (high temperature)

Description of circuits/systems

The electronic engine management system (ECM) controller controls the cooling system fan operating at low RPM, grounding the control circuit of the cooling system fan relay 1 by means of an internal semiconductor device, the so-called driver. To activate the cooling system fan operating at high speed, the ECM controller grounds the control circuit of the cooling system fan relay 2 simultaneously with the grounding of the control circuit of the cooling system fan relay 1. The positive battery terminal voltage is applied to cooling system fan relay 1, cooling system fan relay 2, and cooling system fan control relay. When the ECM controller sends a switch-on command to the cooling fan relay, the control circuit voltage should be low, about 0 volts. When the ECM controller sends a switch-off command to the cooling system fan relay, the voltage potential of the control circuit must be high, close to the battery voltage.

Conditions for Setting the DTC

P0480(01), P0480(54), P0481(01) and P0481(54)

Current is supplied to the cooling system fan control relay coil
The ignition switch is in the on position.
Battery voltage from 8.5 V to 16.5 V

P0480(02), P0480(04), P0481(02) and P0481(04)

The cooling system fan control relay coil is de-energized
The ignition switch is in the on position.
Battery voltage from 8.5 V to 16.5 V

Conditions for setting the fault code.

P0480(01) and P0481(01)

There is a short circuit to battery voltage in the control circuit of the cooling fan relay

P0480(02) and P0481(02)

There is a short circuit to ground in the control circuit of the cooling fan relay

P0480(04) and P0481(04)

There is an open in the control circuit of the cooling fan relay

P0480(54) and P0481(54)

There is a high temperature in the control circuit of the cooling fan relay

Actions to Take When a DTC Sets

DTCs P0480 and P0481 are Cnl type codes.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTCs P0480 and P0481 are Cnl type codes.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".

DTC P0480, P0481

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Install the diagnostic tool. Turn on the ignition with the engine off. Using a diagnostic tool, send commands to relay 2 of the cooling system fan to turn it on and off. Does the cooling fan relay 2 turn on and off according to each command?	-	Go to operation 3	Go to operation 4
3	Using a diagnostic tool, send commands to relay 1 of the cooling system fan to turn it on and off. Do cooling fan relay 1 and cooling fan control relay turn on and off according to each command?	-	Go to Diagnostic Information	Go to operation 6
4	Turn off the ignition. Disconnect relay 2 of the cooling system fan. Turn on the ignition with the engine off. Check the supply voltage circuit of the cooling system fan relay 2 winding using a test lamp connected to a reliable ground. Is the indicator light on?	-	Go to operation 5	Go to operation 16
5	Connect a test lamp between the control circuit of the cooling fan relay 2 and the supply voltage circuit of the cooling fan relay 2 coil. Using a diagnostic tool, send commands to relay 2 of the cooling system fan to turn it on and off. Does the indicator light come on and go out according to each command?	-	Go to operation 12	Go to operation 9
6	Turn off the ignition. Disconnect cooling fan relay 1. Turn on the ignition with the engine off. Check the supply voltage circuit of the cooling system fan relay 1 winding using a test lamp connected to a reliable ground. Is the indicator light on?	-	Go to operation 7	Go to operation 16
7	Connect a test lamp between the control circuit of cooling fan relay 1 and the supply voltage circuit of the cooling fan relay 1 coil. Using a diagnostic tool, send commands to relay 1 of the cooling system fan to turn it on and off. Does the indicator light come on and go out according to each command?	-	Go to operation 14	Go to operation 8
8	Turn off the ignition. Disconnect the cooling fan control relay. Turn on the ignition with the engine off. Connect a test lamp between the control circuit of the cooling fan control relay and the supply voltage circuit of the cooling fan control relay coil. Using a diagnostic tool, send commands to relay 1 of the cooling system fan to turn it on and off. Does the indicator light come on and go out according to each command?	-	Go to operation 13	Go to operation 9
9	Does the control lamp continue to light with any command?	-	Go to operation 11	Go to operation 10
10	Check the control circuit of the corresponding relay for a short to voltage or an open circuit. Has the problem been detected and corrected?	-	Go to operation 21	Go to operation 15
11	Check the control circuit of the corresponding relay for a short to ground. Has the problem been detected and corrected?	-	Go to operation 21	Go to operation 15
12	Inspect cooling system fan relay 2 for poor contact. Has the problem been detected and corrected?	-	Go to operation 21	Go to operation 17
13	Inspect the cooling system fan control relay for poor contact. Has the problem been detected and corrected?	-	Go to operation 21	Go to operation 18
14	Inspect cooling fan relay 1 for poor contact. Has the problem been detected and corrected?	-	Go to operation 21	Go to operation 19
15	Inspect the ECM harness connector for poor contact. Has the problem been detected and corrected?	-	Go to operation 21	Go to operation 20
16	Eliminate open circuit or increased resistance in the supply voltage circuit. Is the renovation complete?	-	Go to operation 21	-
17	Replace relay 2 of the cooling system fan. Is the renovation complete?	-	Go to operation 21	-
18	Replace the cooling fan control relay. Is the renovation complete?	-	Go to operation 21	-
19	Replace cooling fan relay 1. Is the renovation complete?	-	Go to operation 21	-
20	Replace the ECM. Has the replacement been made?	-	Go to operation 21	-
21	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 22
22	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P0500

DTC Description

DTC P0500 (08): Vehicle Speed Sensor (VSS) Circuit (invalid signal)

DTC P0500 (11): Vehicle Speed Sensor (VSS) Circuit (above the maximum threshold)

DTC P0500 (71): Vehicle Speed Sensor (VSS) Circuit (invalid data received on serial line)

Description of circuits/systems

The vehicle speed sensor (VSS) transmits a pulsed voltage signal to the engine control unit (ECU) that contains vehicle speed information. The AC voltage level and the number of pulses increase with vehicle speed. The converted signal is transmitted to the instrument cluster to control the speedometer/odometer, to the cruise control module, etc. This diagnostic checks the functionality of the serial data link and the reliability of the vehicle speed data transmitted by the VSS.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P0500(08)

The ECM detects that the vehicle speed is less than 1 km/h

P0500(11)

The ECM detects that the vehicle speed is greater than 300 km/h

P0500(71)

The ECM detects a discrepancy between the ECM LAN signal and the vehicle speed

Actions to Take When a DTC Sets

DTC P0500 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0500 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".
Inspect the sensor for improper wiring harness routing and check to see if the wiring harness is too close to the following components:

electromagnetic valves,
relay and
electric motors.

Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.

DTC P0500

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Turn on the ignition. Read DTC information using a diagnostic tool. Are U-codes also installed?	-	Jump to the appropriate diagnostic trouble code table	Go to operation 3
3	Turn on the ignition. Using a scan tool, clear the diagnostic trouble code. Operate the vehicle under conditions that cause the DTC to appear. DTC code showed misfire?	-	Go to operation 4	Go to item "Intermittent Fault Conditions"
4	Perform the diagnostic circuit check in Section 4F "Anti-lock Brake System". Has the problem been detected and corrected?	-	Go to operation 8	Go to operation 5
5	Check technical service bulletins to see if the ECM requires reprogramming. If necessary, reprogram the ECM. Did the ECM need to be reprogrammed?	-	Go to operation 7	Go to operation 6
6	Replace the ECM. Has the replacement been made?	-	Go to operation 7	-
7	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 8
8	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code (DTC) P0513

DTC Description

DTC P0513 (00): Invalid anti-theft system key

Description of circuits/systems

From the immobilizer module or the anti-theft system (VTD) module, a password is sent to the ECM controller via a serial data transmission circuit that allows fuel supply. The ECM controller requests this password. Both the ECM controller and the immobilizer perform calculations based on this request. If the calculated response of the immobilizer module corresponds to the calculation performed by the ECM controller, the ECM controller will grant permission to start the vehicle. The ECM controller prohibits starting the vehicle if any of the following conditions occur:

The password to allow fuel delivery is invalid.
The fuel cut-off password is sent from the immobilizer module.
Password not received. - No connection with the immobilizer module.
The response to the request calculated in the immobilizer module does not match the calculation performed by the ECM.

Conditions for Setting the DTC

The ignition switch is in the on position.
The immobilizer function is activated
The ECU is programmed with secret information

Conditions for setting the fault code.

Immobilizer status is locked due to invalid response

Actions to Take When a DTC Sets

DTC P0500 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0500 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

DTC P0513

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Turn the ignition switch to the LOCK position. Connect the scanning tool to the diagnostic connector. Turn the ignition key to the ON position. Check if there are other immobilizer related DTCs. Are there any DTCs displayed on the display?	-	Jump to the appropriate diagnostic trouble code table	Go to operation 3
3	Perform programming of the anti-theft system components. See Section 9T2 "Anti-theft system with immobilizer" Was programming completed successfully?	-	Go to operation 5	Go to operation 4
4	Replace the ECM. Is the replacement complete?	-	Go to operation 5	-
5	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Subject the vehicle to the conditions that cause the DTC to set. You can also subject the vehicle to the conditions that were observed from the Freeze Frame/Failure Records. DTC code showed misfire?	-	Go to operation 2	Go to operation 6
6	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code (DTC) P0520

DTC Description

DTC P0520 (08): Engine Oil Pressure Switch Circuit (invalid signal)

Description of circuits/systems

When the oil pressure is low, the engine oil pressure switch closes, putting the signal circuit low. The engine control module (ECM) monitors the engine oil pressure switch signal circuit and sends a message to the body control module (BCM) indicating the switch status. The BCM sends a message via the serial data link to the instrument cluster, turning on the low engine oil pressure indicator.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

The ECM detects an invalid engine oil pressure sensor signal

Actions to Take When a DTC Sets

DTC P0520 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0520 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

DTC P0520

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Install the diagnostic tool. Turn on the ignition with the engine off. Using a diagnostic tool, check the engine oil pressure switch parameter. Is the engine oil pressure switch setting Low?	-	Go to item "Intermittent Fault Conditions"	Go to operation 3
3	Turn off the ignition. Disconnect the engine oil pressure sensor. Connect the oil pressure switch signal circuit to a reliable ground using a fused jumper wire. Turn on the ignition, do not start the engine. Using a diagnostic tool, check the engine oil pressure switch parameter. Is the engine oil pressure switch setting Low?	-	Go to operation 5	Go to operation 4
4	Test the engine oil pressure switch signal circuit for an open, high resistance, or short to power. Has the problem been detected and corrected?	-	Go to operation 10	Go to operation 7
5	Check the engine oil pressure switch housing ground for high resistance or poor connection. Has the problem been detected and corrected?	-	Go to operation 10	Go to operation 6
6	Check the engine oil pressure sensor wiring harness connector for poor contact. Has the problem been detected and corrected?	-	Go to operation 10	Go to operation 8
7	Inspect the ECM harness connector for poor contact. Has the problem been detected and corrected?	-	Go to operation 10	Go to operation 9
8	Replace the engine oil pressure sensor. Has the replacement been made?	-	Go to operation 10	-
9	Replace the ECM. Has the replacement been made?	-	Go to operation 10	-
10	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 11
11	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P0530

DTC Description

DTC P0530 (03): Air Conditioning Refrigerant Pressure Sensor Circuit (voltage below threshold)

DTC P0530 (07): Air Conditioning Refrigerant Pressure Sensor Circuit (voltage above threshold)

Description of circuits/systems

The Engine Control Module (ECM) monitors the high-side refrigerant pressure via the Air Conditioning Refrigerant Pressure (ACP) sensor. When the pressure is high, the signal voltage is high. When the pressure is low, the signal voltage is low. When the pressure is too high, the ECM does not allow the A/C compressor clutch to engage.

Conditions for Setting the DTC

The engine speed is greater than 700 rpm.
The ambient temperature is greater than -26°C.

Conditions for setting the fault code.

P0530(03)

The voltage of the A/C refrigerant pressure sensor raw signal is less than 49 mV

P0530(07)

The voltage of the A/C refrigerant pressure sensor raw signal is greater than 4951 mV

Actions to Take When a DTC Sets

DTC P0530 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0530 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

DTC P0530

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Turn on the ignition with the engine off. Using a diagnostic tool, observe the air conditioning pressure (ACP) sensor parameter. Does the scan tool indicate that the ACP sensor parameter is within the specified range?	0.05 - 4.95 V	Go to Diagnostic Information	Go to operation 3
3	Turn off the ignition. Disconnect the wire harness connector from the ACP sensor. Turn on the ignition with the engine off. Using a diagnostic tool, observe the ACP sensor parameter. Does the scan tool indicate that the ACP sensor parameter is less than the specified value?	0.05 V	Go to operation 4	Go to operation 10
4	Turn off the ignition. Connect a 3-amp fused jumper wire between the 5-volt reference circuit of the A/C refrigerant pressure sensor and the signal circuit of the ACP sensor. Turn on the ignition with the engine off. Using a diagnostic tool, observe the ACP sensor parameter. Does the scan tool indicate that the ACP sensor parameter is greater than the specified value?	4.95 V	Go to operation 8	Go to operation 5
5	Disconnect the jumper wire with the fuse. Measure the voltage between the 5V reference circuit of the ACP sensor and the low reference circuit of the ACP sensor. Is the measured voltage less than the specified value?	5.1 V	Go to operation 6	Go to operation 7
6	Turn off the ignition. Disconnect the negative battery cable. Measure the resistance between the ACP low reference circuit and a good ground. Is the measured resistance less than the specified value?	5 Ohm	Go to operation 12	Go to operation 11
7	Check the ACP sensor 5V reference circuit for a short to voltage. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 13
8	Test the ACP sensor 5V reference circuit for a short to ground, high resistance, or open. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 9
9	Check the ACP sensor signal circuit for a short to ground, high resistance, or open. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 13
10	Check the ACP sensor signal circuit for a short to voltage. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 13
11	Disconnect the wiring harness connector from the ECM. Test the ACP sensor low reference circuit for high resistance or open. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 13
12	Check for loose connections at the ACP sensor harness connector. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 14
13	Check the reliability of the connections of the ECM wiring harness connector. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 15
14	Replace the air conditioning pressure sensor. Has the replacement been made?	-	Go to operation 16	Go to operation 15
15	Replace the ECM. Has the replacement been made?	-	Go to operation 16	-
16	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Subject the vehicle to the conditions that cause the DTC to set. You can also subject the vehicle to the conditions that were observed from the Freeze Frame/Failure Records. DTC code showed misfire?	-	Go to operation 2	Go to operation 17
17	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Codes P0544, P2031, P2080, P2084, P20E2

DTC Description

DTC P0544 (03): Exhaust Gas Temperature (EGT) Sensor 1 Circuit (voltage below threshold)

DTC P0544 (07): Exhaust Gas Temperature (EGT) Sensor 1 Circuit (voltage above threshold)

DTC P2031 (03): Exhaust Gas Temperature (EGT) Sensor 2 Circuit (voltage below threshold)

DTC P2031 (07): Exhaust Gas Temperature (EGT) Sensor 2 Circuit (voltage above threshold)

DTC P2080 (08): Exhaust Gas Temperature (EGT) Sensor 1 Performance (invalid signal)

DTC P2080 (13): Exhaust Gas Temperature (EGT) Sensor 1 Performance (low voltage/high temperature)

DTC P2080 (14): Exhaust Gas Temperature (EGT) Sensor 1 Performance (high voltage/low temperature)

DTC P2084 (08): Exhaust Gas Temperature (EGT) Sensor 2 Performance (invalid signal)

DTC P2084 (13): Exhaust Gas Temperature (EGT) Sensor 2 Performance (low voltage/high temperature)

DTC P2084 (14): Exhaust Gas Temperature (EGT) Sensor 2 Performance (high voltage/low temperature)

DTC P20E2 (5A): Exhaust Gas Temperature (EGT) Sensor 1-2 Correlation (inconsistency)

Description of circuits/systems

The ECM supplies a 5-volt reference voltage to the exhaust gas temperature sensor via the signal circuit and ground via the low reference circuit. The exhaust gas temperature sensor is a variable resistance that measures the temperature of the exhaust gases.

As the exhaust gas temperature increases, the resistance of the exhaust gas temperature sensor increases. Thus, the higher the exhaust gas temperature, the higher the signal voltage at the exhaust gas temperature sensor output.
As the exhaust gas temperature decreases, the resistance of the exhaust gas temperature sensor decreases. Thus, the lower the exhaust gas temperature, the lower the signal voltage at the exhaust gas temperature sensor output.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P0544(03)

Exhaust Gas Temperature Sensor 1 Source Signal Voltage Less Than 98mV

P0544(07)

Exhaust Gas Temperature Sensor 1 Source Signal Voltage is Greater than 4995 mV

P2031(03)

Exhaust Gas Temperature Sensor 2 Source Signal Voltage Less Than 98mV

P2031(07)

Exhaust Gas Temperature Sensor 2 Source Signal Voltage is Greater than 4995 mV

P2080(13)

The ECM detects that the exhaust gas temperature sensor 1 signal is greater than 800°C

P2080(08)

The ECM detects that the exhaust gas temperature sensor 1 signal is not consistent with the situation

P2080(14)

The ECM detects that the exhaust gas temperature sensor 1 signal is below -55°C

P2084(13)

The ECM detects that the exhaust gas temperature sensor 2 signal is greater than 800°C

P2084(08)

The ECM detects that the difference between the intake air temperature and the exhaust gas temperature sensor 2 reading during a cold start is greater than 67°C

P2084(14)

The ECM detects that the exhaust gas temperature sensor 2 signal is below -55°C

P20E2(5A)

The ECM detects that the difference between the intake air temperature and the exhaust gas temperature sensor 1 reading during a cold start is greater than 40°C

Actions to Take When a DTC Sets

Diagnostic trouble codes DTCs P0544, P2031, P2080, P2084, and P20E2 are Type A codes.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

Diagnostic trouble codes DTCs P0544, P2031, P2080, P2084, and P20E2 are Type A codes.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".

DTC P0544, P2031, P2080, P2084, P20E2

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Check DTC data with a scan tool. Is DTC P2080(08) or P2084(08) also set?	-	Go to operation 10	Go to operation 3
3	Turn off the ignition. Disconnect the wiring harness connector from the exhaust gas temperature sensor. Turn on the ignition. Using a digital multimeter, measure the voltage between the signal circuit and the low reference circuit at the ECM side. Is the measured voltage within the specified range?	4.8 - 5.2 V	Go to operation 4	Go to operation 5
4	Turn off the ignition. Using a digital multimeter, measure the resistance between the signal circuit and the low reference circuit on the sensor side. Is the resistance within the set value?	200 - 600 Ohm	Go to operation 11	Go to operation 10
5	Using a digital multimeter, measure the voltage between the signal circuit (on the sensor side) and reliable grounding. Is the measured voltage within the specified range?	4.8 - 5.2 V	Go to operation 7	Go to operation 6
6	Using a digital multimeter, measure the voltage between the signal circuit (on the sensor side) and reliable grounding. Is the voltage less than the specified value?	4.8 V	Go to operation 9	Go to operation 8
7	Check for a short to battery voltage, short to ground, or high resistance in the low reference circuit. Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 11
8	Check the signal circuit for a short to battery voltage. Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 11
9	Test the signal circuit for a short to ground or high resistance. Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 11
10	Replace the exhaust gas temperature sensor. Has the replacement been made?	-	Go to operation 12	-
11	Replace the ECM. Has the replacement been made?	-	Go to operation 12	-
12	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 13
13	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Codes P0560, P2533

DTC Description

DTC P0560 (11): On-board network voltage (above the maximum threshold)

DTC P2533 (06): Ignition Switch Circuit 1 (short to ground or open circuit)

Description of circuits/systems

The electronic engine management system (ECM) controller measures the ignition voltage 1, making sure that it remains in the required range. If the voltage goes out of the acceptable range, components may be damaged or incorrect data may be entered. The ECM controller monitors the on-board network voltage for a long time. If the ECM controller detects that the ignition voltage 1 is out of the expected range during the calibrated time interval, a diagnostic fault code is set.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P0560(03)

The ECM detects that the battery voltage is less than 7.5 V.

P0560(11)

The ECM detects that the filtered battery voltage is greater than 4966 mV.

P2533(06)

The ECM does not detect the ignition voltage position signal

Actions to Take When a DTC Sets

Diagnostic trouble codes P0560 and P2533 are Type E codes.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

Diagnostic trouble codes P0560 and P2533 are Type E codes.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".

DTC P0560 or P2533

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Install the diagnostic tool. Operate the vehicle under conditions that cause the DTC to appear. Does the scan tool indicate that DTC P0560 has passed on this ignition cycle?	-	Go to item "Intermittent faults".	Go to operation 3
3	Install the diagnostic tool. Start the engine. Using a diagnostic tool, observe the ignition voltage sensor 1 parameter. Does the scan tool indicate that the battery voltage parameter is within the specified range?	9 - 16 V	Go to operation 6	Go to operation 4
4	Test the ECM ignition 1 voltage circuit for a high resistance or open. Has the problem been detected and corrected?	-	Go to operation 7	Go to operation 5
5	Check the reliability of the connections of the ECM wiring harness connector. Has the problem been detected and corrected?	-	Go to operation 7	Check the charging system. See section 1E "ELECTRICAL EQUIPMENT OF THE ENGINE"
6	Replace the ECM. Has the replacement been made?	-	Go to operation 7	-
7	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 8
8	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code (DTC) P0571

DTC Description

DTC P0571 (5A): Brake Switch Circuit 1 (inconsistency)

DTC P0571 (71): Brake Switch Circuit 1 (invalid data received on serial line)

Description of circuits/systems

The brake light switch signal circuit is directly connected to the ECM via a cable from the brake switch assembly. The ECM monitors the brake light switch signal circuit to detect when the brake pedal is applied.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P0571(5A)

The ECM detects that the master and backup brake switches are in different states.

P0571(71)

The ECM detects an error in the brake signal received via the controller LAN

Actions to Take When a DTC Sets

DTC P0571 is a Type A diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0571 is a Type A diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

Inspect the brake lights for proper operation to avoid misdiagnosis.
For intermittent faults, See "Intermittent Fault Conditions".

DTC P0571

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Are the brake lights working properly?	-	Go to operation 3	Cm. section 9B "Lighting Systems"
3	Test the brake light switch signal circuit between the brake switch and the ECM for an open or high resistance. Has the problem been detected and corrected?	-	Go to operation 6	Go to operation 4
4	Check the reliability of the connections of the ECM wiring harness connector. Has the problem been detected and corrected?	-	Go to operation 6	Go to operation 5
5	Replace the ECM. Has the replacement been made?	-	Go to operation 6	-
6	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Subject the vehicle to the conditions that cause the DTC to set. You can also subject the vehicle to the conditions that were observed from the Freeze Frame/Failure Records. DTC code showed misfire?	-	Go to operation 2	Go to operation 7
7	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P0575

DTC Description

DTC P0575 (72): Cruise control switch signal circuit (invalid/not updated health monitor counter value)

DTC P0575 (74): Cruise control switch signal circuit (incorrect calculated signal control value)

Description of circuits/systems

When the cruise control switch is turned on, a voltage signal is sent to the body control module (BCM). The BCM sends a message over the GMLAN serial link to the engine control module (ECM) indicating that the feature is requested to be enabled.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P0575(72)

The ECM detects that the total number of rolling counter errors is greater than 3

P0575(74)

The ECM detects that the total number of control value errors is greater than 5

Actions to Take When a DTC Sets

DTC P0575 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0575 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

This DTC may be stored as a history DTC without affecting the operation of the BCM. If the code is stored as a history DTC and is not read as a current DTC, the BCM should not be replaced. If this DTC is stored as both a current and history DTC, replace the BCM.

DTC P0575

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Is DTC B3794 current for the body control module (BCM)?	-	Go to DTC B3794	Go to operation 3
3	Is DTC B0575 current for the Engine Control Module (ECM)?	-	Go to operation 4	Go to Diagnostic Information
4	Replace BCM. Has the replacement been made?	-	Go to operation 5	-
5	Using a scan tool, clear existing DTCs. Test drive the vehicle under the conditions that caused this DTC to set. Does the DTC code clear?	-	Go to operation 3	The system is normal

Diagnostic trouble code P0602, P0606, P0607, P060A, P060B, P061C, P062B, P062F, P161F, P2226

DTC Description

DTC P0602 (46): The control module is not programmed (vehicle configuration not programmed)

DTC P0606 (00) Control module performance

DTC P0606 (11): Control module performance (above the maximum threshold)

DTC P0606 (12): Control module performance (below the minimum threshold)

DTC P0606 (31): Internal functionality of the control module (total checksum error)

DTC P0606 (33): Internal functionality of the control module (special memory error)

DTC P0606 (37): Control module performance (health/security processor failure)

DTC P0606 (3C): Control module performance (internal data transfer failure)

DTC P0606 (59): Control module performance (circuit/component protection timeout)

DTC P0606 (5A): Control module failure (inconsistency)

DTC P0607 (39): Control module performance (internal electronic malfunction)

DTC P060A (07): Performance of the control module monitoring processor (voltage above threshold)

DTC P060B (03): Performance of the analog-to-digital converter of the control module (voltage below threshold)

DTC P060B (07): Performance of the analog-to-digital converter of the control module (voltage above threshold)

DTC P060B (08): Performance of the analog-to-digital converter of the control module (invalid signal)

DTC P060B (11): Performance of the analog-to-digital converter of the control module (above the maximum threshold)

DTC P061C (00): Engine speed control unit in control module operability

DTC P062B (00): Fuel injector unit in control module operability

DTC P062B (03): Fuel injector unit in control module operability (voltage below threshold)

DTC P062B (32): Fuel injector unit in control module operability (general memory failure)

DTC P062B (39): Fuel injector unit in control module operability (internal electronic malfunction)

DTC P062B (3B): Fuel injector unit in control module operability (internal self-test failure)

DTC P062B (3C): Fuel injector unit in control module operability (internal data transfer failure)

DTC P062B (59): Fuel injector unit in control module operability (circuit/component protection timeout)

DTC P062B (73): Fuel injector unit in control module operability (parity error)

DTC P062F (00): Performance of the control module's long-term memory

DTC P062F (36): Performance of the control module's long-term memory (eEPROM failure)

DTC P062F (41): Performance of the control module's long-term memory (control software/calibration data set not programmed)

DTC P161F (32): Factory assembly mode counter not programmed (general memory failure)

DTC P161F (36): Factory assembly mode counter not programmed (eEPROM failure)

DTC P161F (44): Factory assembly mode counter not programmed (access protection mode is not enabled)

DTC P2226 (03): Barometric Pressure (BARO) Sensor Circuit (voltage below threshold)

DTC P2226 (07): Barometric Pressure (BARO) Sensor Circuit (voltage above threshold)

Description of circuits/systems

These diagnostic trouble codes relate to internal integrity criteria of the engine control module (ECM) microprocessor. These diagnostics also run if the ECM is not programmed.

The ECM monitors its ability to read and write to memory. It also monitors the operation of the timer.

Conditions for Setting the DTC

P0602, P0606, P0607, P060A, P060B, P061C, P062F, P161F and P2226

The ignition switch is in the on position.

P062B

The engine is running

Conditions for setting the fault code.

P0602(46)

The EEPROM does not have the vehicle code programmed in it

P0606(00), P0606(11), P0606(12), P0606(31), P0606(33), P0606(37), P0606(3C) and P0606(5A)

The ECM detects an internal module failure

P0606(59)

The ECM detects that the power supply time has exceeded the override control limit

P0607(39)

The ECM detects a Serial Peripheral Interface (SPI) data communication failure

P060A(07)

The ECM detects that the internal supply voltage has exceeded the upper limit

P060B(03)

ADC reference voltage is less than 3372 mV

P060B(07)

ADC reference voltage is greater than 3871 mV

P060B(08)

The ECM detects an ADC queue failure

P060B(11)

ADC test pulse voltage is greater than 200 mV

P061C(00)

The ECM detects an inconsistency error when checking the engine speed

P062B(00), P062B(03), P062B(32), P062B(39), P062B(3B), P062B(3C), P062B(59) and P062B(73)

The ECM detects an internal power stage failure

P062F(00)

The ECM detects that the EEPROM is using default values

P062F(36)

The ECM detects an EEPROM write error

P062F(41)

The ECM detects an error reading from the EEPROM

P161F(32) and P161F(36)

The ECM detects that the initial data and non-volatile memory key have been destroyed

P161F(44)

Initial data and ECM key not entered

P2226(03)

The calculated atmospheric pressure signal is less than 2199 mV

P2226(07)

The calculated atmospheric pressure signal is greater than 4702 mV

Actions to Take When a DTC Sets

Diagnostic trouble codes DTCs P0602, P0607, and P161F are Cnl type codes.
Diagnostic trouble codes P0606(00), P0606(11), P0606(12), and P062B are Type A codes.
The DTC diagnostic trouble codes P0606 (31), P0606(33), P0606(37), P0606 (3C), P0606 (59), P0606(5A), P060A, P060B, P061C, P062F and P2226 are Type E codes.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

Diagnostic trouble codes DTCs P0602, P0607, and P161F are Cnl type codes.
Diagnostic trouble codes P0606(00), P0606(11), P0606(12), and P062B are Type A codes.
The DTC diagnostic trouble codes P0606 (31), P0606(33), P0606(37), P0606 (3C), P0606 (59), P0606(5A), P060A, P060B, P061C, P062F and P2226 are Type E codes.

Cm. "Diagnostic Trouble Code Definitions"

DTC P0602, P0606, P0607, P060A, P060B, P061C, P062B, P062F, P161F, P2226

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Turn the ignition switch to the LOCK position. Connect the scanning tool to the diagnostic connector. Turn the ignition key to the ON position. Observe DTC data with a scan tool. DTC P0602 failed this ignition cycle?	-	Go to operation 3	Go to operation 6
3	Replace the ECU controller program. DTC P0602 cleared?	-	Go to operation 4	Go to operation 8
4	Did DTC P0606 set while programming the ECM?	-	Go to operation 5	Go to operation 6
5	Check the control module supply voltage and ground circuits for the following faults: Short circuit Cliff High resistance Has the problem been detected and corrected?	-	Go to operation 8	Go to operation 6
6	Using a scan tool, clear the diagnostic trouble codes. Drive the vehicle within the conditions for setting this DTC as specified in the supporting text. Does the scan tool report this diagnostic as passed and successful?	-	Go to operation 9	Go to operation 7
7	Replace the ECM. Has the replacement been made?	-	Go to operation 8	-
8	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 9
9	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code (DTC) P0615

DTC Description

DTC P0615 (01): Starter Relay Control Circuit (short circuit to battery voltage)

DTC P0615 (02): Starter Relay Control Circuit (short circuit to ground)

Description of circuits/systems

When the ignition switch is turned to the START position, the engine control module (ECM) supplies ignition voltage to the starter relay coil. The starter relay control circuit includes a feedback circuit. The ECM can detect an open circuit, a short to ground, or a short to voltage by monitoring the feedback voltage.

Conditions for Setting the DTC

P0615(01)

Current is supplied to the starter relay winding
The ignition switch is in the on position.
Battery voltage is less than 16.5 V.

P0615(02)

Starter relay is de-energized
The ignition switch is in the on position.
Battery voltage is less than 16.5 V.

Conditions for setting the fault code.

P0615(01)

There is a short circuit to battery voltage in the starter relay control circuit

P0615(02)

There is a short circuit to ground in the starter relay control circuit

Actions to Take When a DTC Sets

DTC P0615 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0615 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

If an intermittent fault is suspected, See "Intermittent Fault Conditions".

DTC P0615

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Install the diagnostic tool. Turn on the ignition with the engine off. Using a scanning device, send commands to turn the starter relay on and off. Does the starter relay turn on and off according to each command?	-	Go to item "Intermittent Fault Conditions"	Go to operation 3
3	Turn off the ignition. Disconnect the starter relay. Turn on the ignition with the engine off. Check the starter relay supply voltage circuit using a test lamp connected to a reliable ground. Is the indicator light on?	-	Go to operation 4	Go to operation 8
4	Connect a test lamp between the control circuit and the supply voltage circuit of the starter relay winding. Using a scanning device, send commands to turn the starter relay on and off. Does the indicator light come on and go out according to each command?	-	Go to operation 6	Go to operation 5
5	Check the starter relay circuit for a short to battery voltage, short to ground, open, or high resistance. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 7
6	Check the starter relay for poor contact. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 9
7	Inspect the engine control module (ECM) for poor connections. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 10
8	Correct the starter relay supply voltage circuit. Is the renovation complete?	-	Go to operation 11	-
9	Replace the starter relay. Has the replacement been made?	-	Go to operation 11	-
10	Replace the ECM. Has the replacement been made?	-	Go to operation 11	-
11	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 13
12	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Codes P0621, P0622

DTC Description

DTC P0621 (58): Generator L-terminal circuit (incorrect reaction after an event)

DTC P0621 (59): Generator L-terminal circuit (circuit/component protection timeout)

DTC P0622 (11): Generator F-terminal circuit (above the maximum threshold)

DTC P0622 (12): Generator F-terminal circuit (below the minimum threshold)

Description of circuits/systems

The engine control module (ECM) monitors the generator load on the engine using the voltage at the L-terminal of the generator. The high-voltage driver of the ECM supplies voltage to the voltage regulator. In response, the voltage regulator turns the excitation circuit on and off. When the ECM turns on the high-voltage driver, the voltage regulator turns on the excitation circuit. When the ECM turns off the high-voltage driver, the voltage regulator turns off the excitation circuit.

The ECM controls the generator duty cycle using the generator F-terminal voltage. The generator F-terminal circuit is connected to the high-level output of the generator excitation winding. The high-level voltage driver of the voltage regulator turns the current in the excitation winding on and off. The ECM determines the generator load on the engine based on the pulse-width modulation input signal. This allows the ECM to adjust idle speed to compensate for high electrical loads.

Conditions for Setting the DTC

The engine is running

Conditions for setting the fault code.

P0621(58)

The L-terminal of the generator is in the off state when it is expected to be on

P0621(59)

The L-terminal of the generator is in the on state when it is expected to be off

P0622(11)

Load on F-terminal is greater than 65%

P0622(12)

Load on F-terminal is less than 5%

Actions to Take When a DTC Sets

Diagnostic trouble codes P0621 and P0622 are Cnl type codes.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

Diagnostic trouble codes P0621 and P0622 are Cnl type codes.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".
Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.

DTC P0621 or P0622

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Install the diagnostic tool. Start the engine. Using a diagnostic tool, read the fault code information. DTC code showed misfire?	-	Go to operation 3	Go to item "Intermittent Fault Conditions"
3	Check the generator L-terminal circuit for a short or open circuit. Has the problem been detected and corrected?	-	Go to operation 7	Go to operation 4
4	Check the generator F-terminal circuit for a short or open. Has the problem been detected and corrected?	-	Go to operation 7	Go to operation 5
5	Inspect the ECM harness connector for poor contact. Has the problem been detected and corrected?	-	Go to operation 7	Go to operation 6
6	Replace the ECM. Has the replacement been made?	-	Go to operation 7	-
7	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 8
8	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code (DTC) P0627

DTC Description

DTC P0627 (01): Fuel Pump Relay Control Circuit (short circuit to battery voltage)

DTC P0627 (02): Fuel Pump Relay Control Circuit (short circuit to ground)

DTC P0627 (04): Fuel Pump Relay Control Circuit (chain break)

DTC P0627 (54): Fuel Pump Control Relay Control Circuit (high temperature)

Description of circuits/systems

The engine control module (ECM) supplies ignition voltage to the fuel pump relay coil whenever the engine is cranking or running. The control module supplies voltage to the relay coil whenever the engine is cranking or running and ignition reference pulses are received. If ignition reference pulses are not received, the control module turns off the fuel pump.

The fuel pump relay control circuit includes a feedback circuit. The ECM can detect an open circuit, a short to ground, or a short to voltage by monitoring the feedback voltage.

Conditions for Setting the DTC

P0627(01) and P0627(54)

The fuel pump is energized
The engine is in the starting or running state

P0627(02) and P0627(04)

Fuel pump is off
The ignition switch is in the on position.

Conditions for setting the fault code.

P0627(01)

There is a short circuit to battery voltage in the fuel pump relay control circuit

P0627(02)

There is a short to ground in the fuel pump relay control circuit

P0627(04)

There is an open in the fuel pump relay control circuit

P0627(54)

There is a high temperature in the fuel pump relay control circuit

Actions to Take When a DTC Sets

DTC P0627 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0627 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

If an intermittent fault is suspected, See "Intermittent Fault Conditions".

DTC P0627

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Turn on the ignition with the engine off. Using a scan tool, command the fuel pump relay to turn on and off. Does the fuel pump relay turn on and off according to each command?	-	Go to operation 3	Go to operation 4
3	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 4	Go to Diagnostic Information
4	Turn off the ignition. Disconnect the fuel pump relay. Turn on the ignition with the engine off. Check the fuel pump relay control circuit with a test lamp connected to a reliable ground. Using a scan tool, command the fuel pump relay to turn on and off. Does the indicator light come on and go out when receiving on and off commands?	-	Go to operation 5	Go to operation 6
5	Connect a test light between the control circuit and the ground circuit of the fuel pump relay. Using a scan tool, command the fuel pump relay to turn on and off. Does the indicator light come on and go out when receiving on and off commands?	-	Go to operation 7	Go to operation 9
6	Check the fuel pump relay control circuit for the following faults: Open circuit or increased resistance Short circuit to power supply Short to ground Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 8
7	Check for intermittent faults and poor contact at the fuel pump relay. Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 10
8	Check for intermittent faults and loose connections at the ECM. Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 11
9	Repair open circuit or high resistance in the fuel pump relay ground circuit. Is the renovation complete?	-	Go to operation 12	-
10	Replace the fuel pump relay. Has the replacement been made?	-	Go to operation 12	-
11	Replace the ECM. Has the replacement been made?	-	Go to operation 12	-
12	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 13
13	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Codes (DTC) P0630, P161C, P253F, P268A

DTC Description

DTC P0630 (36): Not programmed or incorrect VIN - ECM (eEPROM failure)

DTC P0630 (47): Not programmed or incorrect VIN - ECM (vIN not programmed)

DTC P161C (00): Tire size not programmed

DTC P253F (00): Service life of motor oil

DTC P268A (00): Fuel injector calibration not programmed

Description of circuits/systems

The Engine Control Module (ECM) stores various information about the vehicle such as the vehicle identification number, tire size, engine oil quality information, fuel injector calibration information, etc. This DTC is set if this information is not programmed into the ECM.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P0630(36)

The ECM detects that the EEPROM cells where the VIN is stored are unreadable

P0630(47)

The ECM detects that the VIN is not programmed.

P161C(00)

The ECM detects that the tire circumference is not programmed.

P253F(00)

The ECM detects an "oil change soon" or "oil change required" status

P268A(00)

The ECM detects that the fuel injector flow codes are not programmed

Actions to Take When a DTC Sets

Diagnostic trouble codes DTCs P0630, P161C, and P253F are Cnl type codes.
DTC P268A is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

Diagnostic trouble codes DTCs P0630, P161C, and P253F are Cnl type codes.
DTC P268A is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

DTC P0630, P161C, P253F, P268A

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Install the diagnostic tool. Turn on the ignition, do not start the engine. Using a scanning device, read the following information: For DTC P0630: Vehicle Identification Number (VIN) For DTC P161C: Tire Size For DTC P253F: Engine Oil Life For DTC P268A: Fuel Injector Trim Data (IQA) Is the information saved?	-	Go to operation 3	Go to operation 4
3	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Turn on the ignition. Operate the vehicle under conditions that cause the DTC to appear. DTC comes and goes?	-	Go to operation 7	Go to operation 5
4	Using a scanning device, write information to the ECM; For DTC P0630: Vehicle Identification Number (VIN) For DTC P161C: Tire Size For DTC P253F: Engine Oil Life For DTC P268A: Fuel Injector Trim Data (IQA) Is the recording complete?	-	Go to operation 6	-
5	Replace the ECM. Has the replacement been made?	-	Go to operation 6	-
6	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Turn on the ignition. Operate the vehicle under conditions that cause the DTC to appear. DTC comes and goes?	-	Go to operation 7	Go to operation 2
7	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code (DTC) P0633

DTC Description

DTC P0633 (00): Anti-theft system key not programmed

Description of circuits/systems

To learn the fuel enable password, request and response sequence, the ECM is placed in the learn mode. The automatically setting DTC P0633 is not a malfunction indicator, but rather indicates that the system is in the learn mode. Once the password and request/response are learned, the system will exit the learn mode and the DTC will be cleared. If the ECM does not exit the learn mode, DTC P0633 will become current, indicating a malfunction.

Conditions for Setting the DTC

The ignition switch is in the on position.
The immobilizer function is activated

Conditions for setting the fault code.

The ECM detects that the immobilizer key is not programmed

Actions to Take When a DTC Sets

DTC P0633 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0633 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

the "key" referenced by the DTC ID does not correspond to the vehicle key. In this case, the "key" refers to the challenge-response method.

DTC P0633

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Turn the ignition switch to the LOCK position. Connect the scanning tool to the diagnostic connector. Turn the ignition key to the ON position. Check if there are other immobilizer related DTCs. Are there any DTCs displayed on the display?	-	Jump to the appropriate diagnostic trouble code table	Go to operation 3
3	Perform programming of the anti-theft system components. See Section 9T2 "Anti-theft system with immobilizer" Was programming completed successfully?	-	Go to operation 5	Go to operation 4
4	Replace the ECM. Is the replacement complete?	-	Go to operation 5	-
5	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Subject the vehicle to the conditions that cause the DTC to set. You can also subject the vehicle to the conditions that were observed from the Freeze Frame/Failure Records. DTC code showed misfire?	-	Go to operation 2	Go to operation 6
6	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Codes (DTC) P0641, P0651, P0697

DTC Description

DTC P0641 (03): 5V Reference Voltage Circuit 1 (voltage below threshold)

DTC P0641 (07): 5V Reference Voltage Circuit 1 (voltage above threshold)

DTC P0651 (03): 5V Reference Voltage Circuit 2 (voltage below threshold)

DTC P0651 (07): 5V Reference Voltage Circuit 2 (voltage above threshold)

DTC P0697 (03): 5V Reference Voltage Circuit 3 (voltage below threshold)

DTC P0697 (07): 5V Reference Voltage Circuit 3 (voltage above threshold)

Description of circuits/systems

The Engine Management System (EMS) controller supplies the following sensors with 5 volts via:

5V Reference Voltage Circuit 1

Accelerator Pedal Position (APP) Sensor 1.

5V Reference Voltage Circuit 2

Accelerator Pedal Position (APP) Sensor 2.
Boost pressure sensor
Fuel Rail Pressure (FRP) Sensor

- 5V reference signal circuit 3

Air Conditioning Pressure (ACP) Sensor
Diesel Particulate Filter (DPF) Pressure Sensor

A fault in the 5V reference voltage circuit of one of the sensors may affect the 5V reference voltage circuits of other sensors. The ECM controller monitors the voltage on the 5 V reference circuit. If the ECM controller detects that the voltage is out of the acceptable range, a diagnostic fault code is set.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P0641(03), P0651(03) and P0697(03)

The ECM detects that the reference voltage is below the threshold

DTCs P0641(07), P0651(07) and P0697(07)

The ECM detects that the reference voltage is above the threshold

Actions to Take When a DTC Sets

Diagnostic trouble codes DTCs P0641, P0651, and P0697 are Type E codes.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

Diagnostic trouble codes DTCs P0641, P0651, and P0697 are Type E codes.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".
Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.

DTC P0641, P0651, P0697

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Subject the vehicle to the conditions that cause the DTC to set. You can also subject the vehicle to the conditions that were observed from the Freeze Frame/Failure Records. DTC code showed misfire?	-	Go to operation 3	Go to the "Diagnostic information" section
3	Turn off the ignition. Disconnect the harness connector from the sensor using the 5V reference circuit. Turn on the ignition with the engine off. Measure the voltage between the sensor's 5V reference circuit and a good ground using a digital multimeter (DMM). Repeat the above steps for the remaining sensors sharing the 5V reference circuit, one sensor at a time. Is the voltage within the specified range?	4.8 - 5.2 V	Go to operation 7	Go to operation 4
4	Is the voltage measured in the previous step higher than the specified value?	5.2 V	Go to operation 5	Go to operation 6
5	Check 5V reference circuit for short to voltage Has the problem been detected and corrected?	-	Go to operation 9	Go to operation 8
6	Check the 5V reference circuit for a short to ground or a short to the low reference circuit of any of the sensors. Has the problem been detected and corrected?	-	Go to operation 9	Go to operation 8
7	Replace faulty sensors. Has the replacement been made?	-	Go to operation 9	-
8	Replace the ECM. Has the replacement been made?	-	Go to operation 9	-
9	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Subject the vehicle to the conditions that cause the DTC to set. You can also subject the vehicle to the conditions that were observed from the Freeze Frame/Failure Records. DTC code showed misfire?	-	Go to operation 2	Go to operation 10
10	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code (DTC) P0645

DTC Description

DTC P0645 (01): Air Conditioning Clutch Relay Control Circuit (short circuit to battery voltage)

DTC P0645 (02): Air Conditioning Clutch Relay Control Circuit (short circuit to ground)

DTC P0645 (04): Air Conditioning Clutch Relay Control Circuit (chain break)

DTC P0645 (54): Air Conditioning Clutch Relay Control Circuit (high temperature)

Description of circuits/systems

The engine control module (ECM) controls the supply voltage to the air conditioner compressor by grounding the control circuit of the air conditioner compressor relay through an internal semiconductor device called a driver. When the ECM commands the air conditioner compressor relay to turn on, the control circuit voltage should be low, close to 0 volts. When the ECM commands the air conditioner compressor relay to turn off, the control circuit voltage potential should be high, close to battery voltage. If the ECM detects an abnormal condition of the circuit, a DTC is set.

Conditions for Setting the DTC

The ignition switch is in the on position.
Battery voltage from 8V to 16.5V

Conditions for setting the fault code.

P0645(01)

There is a short circuit to battery voltage in the air conditioning compressor control circuit

P0645(02)

There is a short circuit to battery voltage in the air conditioning compressor control circuit

P0645(04)

There is an open circuit in the air conditioning compressor control circuit

P0645(54)

There is a high temperature in the air conditioning compressor control circuit

Actions to Take When a DTC Sets

DTC P0645 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0645 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For intermittent faults, See "Intermittent faults"
Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.

DTC P0645

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Turn on the ignition with the engine off. Using the diagnostic tool, issue commands to turn the air conditioning compressor relay on and off. Can you hear clicking sounds coming from the air conditioning compressor clutch?	-	Go to operation 3	Go to operation 4
3	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 4	Go to Diagnostic Information
4	Turn off the ignition. Disconnect the air conditioning compressor relay. Turn on the ignition with the engine off. Check the control circuit of the air conditioner compressor relay with a test lamp connected to the positive terminal of the battery. Using the diagnostic tool, issue commands to turn the air conditioning compressor relay on and off. Does the indicator light come on and go out when receiving on and off commands?	-	Go to operation 5	Go to operation 6
5	Connect a test lamp between the control circuit and the supply voltage circuit of the air conditioning compressor relay. Using the diagnostic tool, issue commands to turn the air conditioning compressor relay on and off. Does the indicator light come on and go out when receiving on and off commands?	-	Go to operation 7	Go to operation 9
6	Check the A/C compressor relay control circuit for the following conditions: Open circuit or increased resistance Short circuit to power supply Short to ground Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 8
7	Check for intermittent faults and secure connections in the air conditioner compressor relay. Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 10
8	Check for intermittent faults and loose connections at the ECM. Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 11
9	Eliminate open circuit, high resistance or short circuit to ground in the supply voltage circuit of the air conditioning compressor relay. Is the renovation complete?	-	Go to operation 12	-
10	Replace the air conditioning compressor relay. Has the replacement been made?	-	Go to operation 12	-
11	Replace the ECM. Has the replacement been made?	-	Go to operation 12	-
12	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 13
13	Using a scan tool, clear existing DTCs. Test drive the vehicle under the conditions that caused this DTC to set. Does the DTC code clear?	-	Go to operation 3	Jump to the appropriate diagnostic trouble code table

Diagnostic trouble code P064C, P0670, P0671, P0672, P0673, P0674, P0683, P161E

DTC Description

DTC P064C (00): Performance of the glow plug control module

DTC P0670 (01): Glow Plug Control Module Control Circuit (short circuit to battery voltage)

DTC P0670 (02): Glow Plug Control Module Control Circuit (short circuit to ground)

DTC P0670 (04): Glow Plug Control Module Control Circuit (chain break)

DTC P0670 (54): Glow Plug Control Module Control Circuit (high temperature)

DTC P0671 (02): Glow Plug Control Circuit 1 (short circuit to ground)

DTC P0671 (04): Glow Plug Control Circuit 1 (chain break)

DTC P0672 (02): Glow Plug Control Circuit 2 (short circuit to ground)

DTC P0672 (04): Glow Plug Control Circuit 2 (chain break)

DTC P0673 (02): Glow Plug Control Circuit 3 (short circuit to ground)

DTC P0673 (04): Glow Plug Control Circuit 3 (chain break)

DTC P0674 (02): Glow Plug Control Circuit 4 (short circuit to ground)

DTC P0674 (04): Glow Plug Control Circuit 4 (chain break)

DTC P0683 (00): Glow Plug Control Module Communication Circuit

DTC P0683 (3A): Glow Plug Control Module Communication Circuit (invalid component installed)

DTC P0683 (71): Glow Plug Control Module Communication Circuit (invalid data received on serial line)

DTC P161E (00): Glow Plug Positive Voltage Circuit

Description of circuits/systems

The preheating spark plug control unit can perform internal diagnostics of the voltages and states of the preheating spark plug outputs. If the preheating candle control unit detects a break in the voltage supply circuit to the preheating candle control circuit or a malfunction in any of the circuits of the preheating candle shapers, the preheating candle control unit sends an error message to the ECM controller.

Conditions for Setting the DTC

P064C(00), P0671(02), P0671(04), P0672(02), P0672(04), P0673(02), P0673(04), P0674(02), P0674(04), P0683(00), P0683(3A), P0683(71) and P161E(00)

The ignition switch is in the on position.
Battery voltage from 8.5 V to 16.5 V

P0670(01) and P0670(54)

The power stage of the control circuit of the control unit of the pre-starting glow plugs is on
The ignition switch is in the on position.
Battery voltage from 8.5 V to 16.5 V

P0670(02) and P0670(04)

The power stage of the control circuit of the control unit of the pre-starting glow plugs is turned off
The ignition switch is in the on position.
Battery voltage from 8.5 V to 16.5 V

Conditions for setting the fault code.

P064C(00)

The ECM detects a malfunction in the glow plug control unit

P0670(01)

There is a short circuit to battery voltage in the control circuit of the glow plug control unit

P0670(02)

There is a short circuit to ground in the control circuit of the glow plug control unit

P0670(04)

There is an open circuit in the control circuit of the glow plug control unit

P0670(54)

There is a high temperature in the control circuit of the glow plug control unit

P0671(02), P0672(02), P0673(02) and P0674(02)

There is a short circuit or overcurrent in the glow plug control circuit

P0671(04), P0672(04), P0673(04) and P0674(04)

There is a wiring defect or open circuit in the glow plug 1 control circuit or glow plug 1 is faulty

P0683(00)

The ECM detects that the glow plug control module is reporting an erroneous diagnostic information or protocol error

P0683(3A)

The ECM detects a lack of communication with the glow plug control unit

P0683(71)

The ECM detects that 3 different communication blocks have been received from the glow plug control module

P161E(00)

The ECM detects no voltage on the glow plug positive voltage circuit

Actions to Take When a DTC Sets

Diagnostic trouble codes DTCs P064C, P0670, P0671, P0672, P0673, P0674, P0683, and P161E are Type Cnl trouble codes.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

Diagnostic trouble codes DTCs P064C, P0670, P0671, P0672, P0673, P0674, P0683, and P161E are Type Cnl trouble codes.

Cm. "Diagnostic Trouble Code Definitions"

DTC P064C, P0670, P0671, P0672, P0673, P0674, P0683, P161E

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Is DTC P064C or P161E also set?	-	Go to operation 9	Go to operation 3
3	Review the Freeze Frame Data for this DTC. Turn off the ignition. Turn on the ignition with the engine off. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 4	Go to item "Intermittent Fault Conditions"
4	Turn on the ignition with the engine off. Check the terminal of the corresponding glow plug using a test lamp connected to ground. Give the command with the scanning device to turn on the pre-heating plugs. Does the indicator light come on when the command is given to turn on the glow plugs?	-	Go to operation 6	Go to operation 5
5	Important: If the glow plug control circuit is shorted to 12V, the glow plug is damaged and must be replaced. If the glow plug being replaced has a missing or burnt tip, the cylinder head must be removed and all residue must be cleaned out of the cylinder. Check the appropriate glow plug control circuit between the glow plug control module and the glow plug for the following conditions: Cliff Short to ground Short circuit to power supply Has the problem been detected and corrected?	-	Go to operation 18	Go to operation 9
6	Turn off the ignition. Disconnect the connectors of the affected glow plugs. Check the terminal of the corresponding glow plug using a test lamp connected to battery voltage. Is the indicator light on?	-	Go to operation 7	Go to operation 15
7	Using a digital multimeter, measure the resistance between the terminal of the affected glow plug and a reliable ground. Does your digital multimeter show resistance less than the specified value?	1 Ohm	Go to operation 8	Go to operation 15
8	Disconnect the wiring harness connector from the glow plug control unit. Using a digital multimeter, measure the resistance of the control circuit of the affected glow plug between the glow plug harness connector and the glow plug control module. Does your digital multimeter show resistance less than the specified value?	1 Ohm	Go to operation 16	Go to operation 12
9	Turn off the ignition. Disconnect the wiring harness connector from the glow plug control unit. Check the battery voltage supply circuit with a test lamp connected to a reliable ground. Is the indicator light on?	-	Go to operation 10	Go to operation 14
10	Turn off the ignition. Disconnect the wiring harness connector from the glow plug control unit. Measure the electrical resistance between the ground circuit and a reliable ground using a digital multimeter. Does your digital multimeter show resistance below the specified value?	-	Go to operation 11	Go to operation 13
11	Check the glow plug control unit wiring harness connector for an intermittent or unreliable connection. Has the problem been detected and corrected?	-	Go to operation 18	Go to operation 16
12	Repair or replace the glow plug wiring harness. Is the renovation complete?	-	Go to operation 18	-
13	Correct high resistance in glow plug control circuit ground circuit. Is the renovation complete?	-	Go to operation 15	-
14	Repair open or short to ground in battery voltage supply circuit. Is the renovation complete?	-	Go to operation 18	-
15	Important: If the glow plug being replaced has a missing or burnt tip, the cylinder head must be removed and all residue must be cleaned out of the cylinder. Replace the glow plug. Has the replacement been made?	-	Go to operation 18	-
16	Replace the glow plug control unit. Test drive the vehicle under the conditions that caused this DTC to set. Check DTC data with a scan tool. DTC code showed misfire?	-	Go to operation 17	Go to operation 18
17	Replace the ECM. Has the replacement been made?	-	Go to operation 18	-
18	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 19
19	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P0700

DTC Description

DTC P0700 (00): Requested to turn on the checkpoint controller malfunction indicator lamp

Description of circuits/systems

This Diagnostic Fault code (DTC) indicates that a DTC code related to exhaust toxicity is installed in the gearbox controller (FCM). The electronic Engine Management System (ECM) controller receives information from the TCM controller via a serial data transmission circuit. The ECM controller turns on the control indicator lamp if the checkpoint controller sends a message through the serial data transmission circuit requesting that this control lamp be turned on. Only DTC P0700 is displayed in the DTC information of the ECM controller.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

The ECM detects that the TCM has requested the MIL to turn on

Actions to Take When a DTC Sets

DTC P0700 is a Type A diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0700 is a Type A diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

DTC P0700

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Connect the scanning tool to the diagnostic connector. Turn on the ignition. Using a scan tool, select the diagnostic trouble code for the transmission controller. Is there a transmission fault code displayed?	-	Go to operation 3	Go to operation 4
3	Repair the gearbox assembly with the final drive. See the transmission repair section in the table with the corresponding fault codes. Using a scan tool, clear the fault codes for the transmission controller. Is the renovation finished?	-	Go to operation 4	-
4	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 5
5	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code (DTC) P0850

DTC Description

DTC P0850 (02): Park/Neutral Shift Circuit (short circuit to ground)

DTC P0850 (05): Park/Neutral Shift Circuit (short circuit to battery voltage or open circuit)

Description of circuits/systems

When the transmission is in Park or Neutral, this switch is closed. The ECM uses this switch to engage the starter.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P0850(02)

The ECM detects that the park/neutral switch is not indicating the park/neutral position while the shift lever position is in the park/neutral position

P0850(05)

The ECM detects that the park/neutral switch indicates the park/neutral position while the shift lever state is not in the park/neutral position

Actions to Take When a DTC Sets

DTC P0850 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0850 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For intermittent faults, See "Intermittent Fault Conditions".
Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.

DTC P0850

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Test the park/neutral switch signal circuit between the park/neutral switch and the ECM for an open or high resistance. Has the problem been detected and corrected?	-	Go to operation 5	Go to operation 3
3	Check the reliability of the connections of the ECM wiring harness connector. Has the problem been detected and corrected?	-	Go to operation 5	Go to operation 4
4	Replace the ECM. Has the replacement been made?	-	Go to operation 5	-
5	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Subject the vehicle to the conditions that cause the DTC to set. You can also subject the vehicle to the conditions that were observed from the Freeze Frame/Failure Records. DTC code showed misfire?	-	Go to operation 2	Go to operation 6
6	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P0856

DTC Description

DTC P0856 (72): Traction control system torque request circuit (invalid/not updated health monitor counter value)

DTC P0856 (74): Traction control system torque request circuit (incorrect calculated signal control value)

Description of circuits/systems

The Electronic Brake Control System (EBCM) controller and the ECM controller simultaneously control the traction control system. The ECM controller reduces the torque applied to the drive wheels, and the EBCM module actively controls the braking of the front wheels to reduce the torque. The EBCM sends a message over the GMLAN serial channel to the Electronic Engine Management System (ECM) controller indicating that the function has been requested to be activated.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P0856(72)

The ECM detects that the total number of control value errors is greater than 5

P0856(74)

The ECM detects that the total number of rolling counter errors is greater than 3

Actions to Take When a DTC Sets

DTC P0856 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P0856 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

This DTC may be stored as a history DTC without affecting the operation of the EBCM. If the code is stored as a history DTC and is not read as a current DTC, do not replace the EBCM. If this DTC is stored as both a current and history DTC, replace the EBCM.

DTC P0856

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Is DTC B0856 current for the Engine Control Module (ECM)?	-	Go to operation 3	Go to Diagnostic Information
3	Replace EBCM. Has the replacement been made?	-	Go to operation 4	-
4	Using a scan tool, clear existing DTCs. Test drive the vehicle under the conditions that caused this DTC to set. Does the DTC code clear?	-	Go to operation 2	The system is normal

Diagnostic Trouble Codes P1446, P1447, P244C, P244D

DTC Description

DTC P1446 (00): Temperature before catalyst too low during regeneration

DTC P1447 (00): Temperature before catalyst too high during regeneration

DTC P244C (00): Too low catalyst temperature during regeneration

DTC P244D (00): Catalyst temperature too high during regeneration

Description of circuits/systems

The diesel aftertreatment system consists of an underhood pre-catalyst and an underbody catalytic converter. The underbody catalytic converter in turn consists of a primary diesel oxidation catalyst (DOC) and a diesel particulate filter (DPF).

The particulate filter consists of silicon carbide coated with a noble metal. One of the main purposes of the particulate filter is to trap particles in the engine exhaust to minimize the emission of soot into the atmosphere.

The soot particles that accumulate in the filter channels are regularly burned off in a process called "regeneration". This prevents the filter from clogging. The ECM commands the DPF to regenerate based on various vehicle operating data, such as the pressure drop across the DPF, exhaust gas temperature, engine oil quality, engine speed, etc. Excessive soot accumulation in the DPF can lead to reduced engine efficiency and cracking of the filter during regeneration.

During the regeneration process, additional portions of fuel are injected into the engine several times after the main injection to increase the exhaust gas temperature. During this time, the temperature of the particulate filter rises to approximately 600°C, and the accumulated soot is oxidized (burned) into carbon dioxide (CO₂).

Pressure tubes connected to the differential pressure sensor on the DPF filter measure the level of soot accumulation in the DPF and, in order to protect the engine, activate regeneration mode when soot accumulation in the filter reaches a critical level.

Conditions for Setting the DTC

The vehicle is in the process of regenerating the diesel particulate filter.

Conditions for setting the fault code.

P1446(00)

The measured temperature upstream of the pre-catalyst (EGT1) is 200°C or more less than the desired temperature

P1447(00)

The measured temperature upstream of the pre-catalyst (EGT1) is 100°C or more higher than the desired temperature

P244C(00)

The measured temperature upstream of the diesel particulate filter (EGT2) is 125°C or more below the desired temperature

P244D(00)

The measured temperature upstream of the diesel particulate filter (EGT2) is greater than the desired temperature by 150°C or more

Actions to Take When a DTC Sets

Diagnostic trouble codes DTCs P1446, P1447, P244C, and P244D are Type A codes.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

Diagnostic trouble codes DTCs P1446, P1447, P244C, and P244D are Type A codes.

Cm. "Diagnostic Trouble Code Definitions"

DTC P1446, P1447, P244C, P244D

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Read DTC information using a diagnostic tool. Are any DTCs set other than P1446, P1447, P244C, and P244D?	-	Jump to the appropriate diagnostic trouble code table	Go to operation 3
3	Check the following sensors and components for proper operation: Exhaust gas temperature sensor 1, 2 Mass Air Flow (MAF) Sensor Throttle actuator Crankshaft Position Sensor (CKP) Camshaft Position Sensor (CMP) Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 4
4	Check the exhaust gas recirculation (EGR) system for the following problems: Stuck in open or closed position Incorrect position of the EGR regulator Wiring harness Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 5
5	Check the following components for air leaks: Air intake system and turbocharging system Charge air cooler Mass Air Flow Sensor/Intake Air Temperature Sensor O-Ring Boost Pressure Sensor Seal Missing or damaged exhaust gas recirculation (EGR) valve gasket Missing or damaged throttle body gasket Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 6
6	Check the fuel filter and low pressure fuel lines for the following problems: Correct installation of the filter Excess water in the fuel filter housing Malfunction of fuel heater, fuel temperature sensor, water in fuel sensor, wiring harness Fuel filter clogging Fuel leak Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 7
7	Inspect the injectors for the following faults: Wear of injectors Corrosion due to water in fuel Incorrect IQA value Wiring harness Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 8
8	Check the high pressure fuel system for the following faults: Wiring harness Lubrication failure due to poor fuel quality Cracks or leaks in the common rail, fuel lines, fuel rail pressure regulator, fuel rail pressure sensor, connectors, etc. Fuel injection pump damage Fuel injection pump desynchronization Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 9
9	Inspect the turbocharger for the following problems: Turbocharger flap stuck Malfunction of the pressure boosting actuator Compressor wheel damage Bearing damage Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 10
10	Check the following basic engine components for proper operation: valve mechanism Valve stem seal Piston/piston ring Cracks in the lubrication channels Oil dilution due to high fuel consumption Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 2
11	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 12
12	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Codes (DTC) P1629, P1631, P1632

DTC Description

DTC P1629 (00): Fuel supply permission signal not received from anti-theft alarm system

DTC P1631 (00): Incorrect fuel supply permission signal from the anti-theft system

DTC P1632 (00): Fuel supply prohibition signal not received from anti-theft system

Description of circuits/systems

The password to allow fuel delivery is invalid.
The fuel cut-off password is sent from the immobilizer module.
Password not received. - No connection with the immobilizer module.
The response to the request calculated in the immobilizer module does not match the calculation performed by the ECM.

Conditions for Setting the DTC

The ignition switch is in the on position.
The immobilizer function is activated

Conditions for setting the fault code.

P1629(00)

Immobilizer status is locked due to lack of response

P1631(00)

The immobilizer did not unlock the engine
Authentication status is not VALID
An incorrect pre-unlock password has been sent to the engine controller

P1632(00)

Immobilizer status is locked due to negative response

Actions to Take When a DTC Sets

Diagnostic trouble codes P1629, P1631, and P1632 are Cnl type codes.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

Diagnostic trouble codes P1629, P1631, and P1632 are Cnl type codes.

Cm. "Diagnostic Trouble Code Definitions"

DTC P1629, P1631, P1632

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Turn the ignition switch to the LOCK position. Connect the scanning tool to the diagnostic connector. Turn the ignition key to the ON position. Check if there are other immobilizer related DTCs. Are there any DTCs displayed on the display?	-	Jump to the appropriate diagnostic trouble code table	Go to operation 3
3	Perform programming of the anti-theft system components. See Section 9T2 "Anti-theft system with immobilizer" Was programming completed successfully?	-	Go to operation 5	Go to operation 4
4	Replace the ECM. Is the replacement complete?	-	Go to operation 5	-
5	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Subject the vehicle to the conditions that cause the DTC to set. You can also subject the vehicle to the conditions that were observed from the Freeze Frame/Failure Records. DTC code showed misfire?	-	Go to operation 2	Go to operation 6
6	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Codes (DTC) P2002, P244B, P2452, P2453, P2458, P2463

DTC Description

DTC P2002 (00): Low efficiency of diesel particulate filter

DTC P244B (11): Too high differential pressure across diesel particulate filter (above the maximum threshold)

DTC P2452 (03): Diesel Particulate Filter Differential Pressure Sensor Circuit (voltage below threshold)

DTC P2452 (07): Diesel Particulate Filter Differential Pressure Sensor Circuit (voltage above threshold)

DTC P2453 (00): Performance of the differential pressure sensor on the diesel particulate filter

DTC P2453 (08): Performance of the differential pressure sensor on the diesel particulate filter (invalid signal)

DTC P2453 (11): Performance of the differential pressure sensor on the diesel particulate filter (above the maximum threshold)

DTC P2453 (12): Performance of the differential pressure sensor on the diesel particulate filter (below the minimum threshold)

DTC P2453 (18): Performance of the differential pressure sensor on the diesel particulate filter (signal amplitude is less than minimum)

DTC P2453 (55): Performance of the differential pressure sensor on the diesel particulate filter (expected number of transitions/events not reached)

DTC P2453 (58): Performance of the differential pressure sensor on the diesel particulate filter (incorrect reaction after an event)

DTC P2458 (59): Diesel Particulate Filter Regeneration Time (circuit/component protection timeout)

DTC P2463 (00): Soot accumulation in diesel particulate filter sensor

DTC P2463 (11): Soot accumulation in diesel particulate filter sensor (above the maximum threshold)

Description of circuits/systems

Conditions for Setting the DTC

P2002(00), P244B(11), P2452(03), P2452(07), P2453(11), P2453(12), P2453(55), P2453(58), P2453(08), P2458(59), P2463(00) and P2463(11)

The ignition switch is in the on position.

P2453(00) and P2453(18)

The ignition switch is in the on position.
The engine is in a braking state after the engine has stopped

Conditions for setting the fault code.

P2002(00)

The ECM detects that the differential pressure across the diesel particulate filter is less than 9 GPa

P244B(11)

The ECM detects that the pressure upstream of the diesel particulate filter exceeds the maximum allowable pressure

P2452(03)

Diesel Particulate Filter (DPF) Differential Pressure Sensor Raw Signal Less Than 200mV

P2452(07)

Diesel Particulate Filter (DPF) Differential Pressure Sensor Raw Signal Greater Than 4721 mV

P2453(00)

The ECM detects that the absolute value of the differential pressure sensor raw signal is greater than 41 hPa, OR
the ECM detects that the difference between the absolute pressure upstream of the particle filter and the atmospheric pressure is greater than 1200 hPa

P2453(11)

The ECM detects that the differential pressure input signal is greater than 900 hPa

P2453(12)

The ECM detects that the differential pressure reference signal is below -40 hPa

P2453(18)

Minimum pressure drop below threshold

P2453(55)

The ECM detects that the filtered differential pressure signal is below -10 hPa

P2453(58)

The ECM detects that the intake air temperature is below 0°C

P2453(08)

The change in pressure difference is less than the positive minimum value

P2458(59)

The ECM detects that the need for regeneration continues after the maximum regeneration time has expired

P2463(00)

The ECM detects that the particle mass in the diesel particulate filter is greater than 50 g

P2463(11)

The ECM detects that the particle mass is greater than 50 g

Actions to Take When a DTC Sets

DTCs P2002, P2453(08), P2453(18), P2453(55), and P2458 are Type E DTCs.
Diagnostic trouble codes P244B, P2452, P2453(00), P2453(11), P2453(12), and P2463 are Type A trouble codes.
DTC P2453(58) is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTCs P2002, P2453(08), P2453(18), P2453(55), and P2458 are Type E DTCs.
Diagnostic trouble codes P244B, P2452, P2453(00), P2453(11), P2453(12), and P2463 are Type A trouble codes.
DTC P2453(58) is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For information about the intermittent fault condition, See "Intermittent Fault Conditions".
Inspect the sensor for improper wiring harness routing and check to see if the wiring harness is too close to the following components:

electromagnetic valves,
relay and
electric motors.

Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.

DTC P2002, P244B, P2452, P2453, P2458, P2463

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Check whether one or more criteria for regeneration of the diesel particulate filter occur during maintenance. See "Setting up to replace components" in the section "PROGRAMMING AND CONFIGURING THE ELECTRONIC ENGINE MANAGEMENT SYSTEM CONTROLLER (DIESEL ENGINE Z20S)" Does the DPF system require regeneration during maintenance?	-	See "Regeneration of the diesel particulate filter during maintenance"	Go to operation 3
3	Check the following components for leaks and/or blockages: Exhaust system Catalytic converter Diesel Particulate Filter (DPF) Exhaust gas temperature sensor 1, 2 Differential pressure sensor on the diesel particulate filter Note: Before replacing a component, check the hoses for leaks or blockages Has the problem been detected and corrected?	-	Go to operation 14	Go to operation 4
4	Turn on the ignition. Read DTC information using a diagnostic tool. Is the diagnostic trouble code P2453(0) set?	-	Go to operation 12	Go to operation 5
5	Turn off the ignition. Disconnect the wiring harness connector from the differential pressure sensor on the diesel particulate filter. Turn on the ignition. Using a digital multimeter, measure the voltage between the 5V reference circuit and the low reference circuit of the DPF differential pressure sensor. Is the voltage value within the set limits?	4.8 - 5.2 V	Go to operation 6	Go to operation 7
6	Turn on the ignition. Using a diagnostic tool, monitor the pressure drop parameter on the particulate filter. Is the parameter less than the specified value?	0.3 V	Go to operation 8	Go to operation 9
7	Using a digital multimeter, measure the voltage between the 5V reference circuit of the DPF differential pressure sensor and a good ground connection. Is the voltage value within the set limits?	4.8 - 5.2 V	Go to operation 10	Go to operation 11
8	Check the signal circuit of the differential pressure sensor on the diesel particulate filter for the following faults: Short circuit with "ground" Breakup High resistance Has the problem been detected and corrected?	-	Go to operation 14	Go to operation 12
9	Check the signal circuit of the differential pressure sensor on the diesel particulate filter for a short circuit to battery voltage: Has the problem been detected and corrected?	-	Go to operation 14	Go to operation 13
10	Check the low reference circuit of the DPF differential pressure sensor for the following conditions: Short circuit to voltage Breakup High resistance Has the problem been detected and corrected?	-	Go to operation 14	Go to operation 13
11	Check the 5V reference circuit of the differential pressure sensor on the diesel particulate filter for the following faults: Short circuit to voltage Short circuit with "ground" Breakup High resistance Has the problem been detected and corrected?	-	Go to operation 14	Go to operation 13
12	Replace the differential pressure sensor on the diesel particulate filter. Has the replacement been made?	-	Go to operation 14	-
13	Replace the ECM. Has the replacement been made?	-	Go to operation 14	-
14	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 15
15	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Codes P2120, P2125, P2138, P2299

DTC Description

DTC P2120 (03): Accelerator Pedal Position Sensor 1 Circuit (voltage below threshold)

DTC P2120 (07): Accelerator Pedal Position Sensor 1 Circuit (voltage above threshold)

DTC P2125 (03): Accelerator Pedal Position Sensor 2 Circuit (voltage below threshold)

DTC P2125 (07): Accelerator Pedal Position Sensor 2 Circuit (voltage above threshold)

DTC P2138 (5A): Accelerator Pedal Position Sensor 1-2 Correlation (inconsistency)

DTC P2299 (5A): Correlation of brake pedal and accelerator pedal positions (inconsistency)

Description of circuits/systems

The accelerator pedal assembly contains 2 accelerator pedal position (APP) sensors. The APP sensors are mounted on the accelerator pedal assembly and are not serviceable. The APP sensors provide a signal voltage that varies depending on the accelerator pedal position. The ECM supplies separate 5-volt reference circuit and low-voltage reference circuit for each of the APP sensors.

The APP sensor 1 signal voltage increases as the pedal is depressed, from approximately 1.0 volts in the rest position to more than 4 volts when the accelerator pedal is fully depressed. The APP sensor 2 signal voltage increases as the pedal is depressed, from approximately 0.5 volts in the rest position to more than 2 volts when the accelerator pedal is fully depressed.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P2120(03)

APP Sensor 1 Source Signal Voltage Below 596mV

P2120(07)

APP Sensor 1 Source Signal Voltage is greater than 4624 mV

P2125(03)

APP sensor 2 raw signal voltage is below 288 mV

P2125(07)

APP sensor 2 raw signal voltage is greater than 2326 mV

P2138(5A)

The difference between APP 1 and APP 2 signals is greater than expected

P2299(5A)

The ECM detects that the accelerator pedal and brake are applied simultaneously or the accelerator pedal was pressed before the brake.

Actions to Take When a DTC Sets

DTCs P2120, P2125, and P2138 are type Cnl diagnostic trouble codes.
DTC P2299 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTCs P2120, P2125, and P2138 are type Cnl diagnostic trouble codes.
DTC P2299 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For intermittent faults, See "Intermittent faults"
Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.

DTC P2120, P2125, P2138, P2299

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Turn off the ignition. Disconnect the wiring harness connector from the APP sensor. Turn on the ignition. Using a digital multimeter (DMM), measure the voltage between the 5V reference circuit of the APP Sensor 1 and a good ground. Is the measured voltage within the specified range?	4.8 - 5.2 V	Go to operation 3	Go to operation 10
3	Using a digital multimeter (DMM), measure the voltage between the 5V reference circuit and the low reference circuit of the APP sensor 1. Is the measured voltage within the specified range?	4.8 - 5.2 V	Go to operation 4	Go to operation 11
4	Turn on the ignition, do not start the engine. Using the diagnostic tool, observe the APP sensor parameter 1. Does the scan tool indicate that the APP sensor parameter is less than the specified value?	0.3 V	Go to operation 5	Go to operation 12
5	Turn off the ignition. Connect a fused jumper wire between the 5V reference circuit and the APP sensor 1 signal circuit. Turn on the ignition, do not start the engine. Using the diagnostic tool, observe the APP sensor parameter 1. Does the scan tool indicate that the APP sensor parameter is within the specified value?	4.8 - 5.2 V	Go to operation 6	Go to operation 13
6	Turn off the ignition. Remove the jumper wire with the fuse. Using a digital multimeter (DMM), measure the voltage between the 5V reference circuit of the APP Sensor 2 and a good ground. Is the measured voltage within the specified range?	4.8 - 5.2 V	Go to operation 7	Go to operation 14
7	Using a digital multimeter (DMM), measure the voltage between the 5V reference circuit and the low reference circuit of the APP sensor 2. Is the measured voltage within the specified range?	4.8 - 5.2 V	Go to operation 8	Go to operation 15
8	Turn on the ignition, do not start the engine. Using the diagnostic tool, observe the APP sensor parameter 2. Does the scan tool indicate that the APP sensor parameter is less than the specified value?	0.3 V	Go to operation 9	Go to operation 16
9	Turn off the ignition. Connect a fused jumper wire between the 5V reference circuit and the APP sensor 2 signal circuit. Turn on the ignition, do not start the engine. Using the diagnostic tool, observe the APP sensor parameter 2. Does the scan tool indicate that the APP sensor parameter is within the specified value?	4.8 - 5.2 V	Go to operation 18	Go to operation 17
10	Test the APP Sensor 1 5V reference circuit for the following conditions: Short circuit to voltage Short circuit with "ground" Breakup High resistance Has the problem been detected and corrected?	-	Go to operation 20	Go to operation 19
11	Test the APP Sensor 1 low reference circuit for the following conditions: Short circuit to voltage Breakup High resistance Has the problem been detected and corrected?	-	Go to operation 20	Go to operation 19
12	Test the APP Sensor 1 signal circuit for the following condition: Short circuit to voltage Has the problem been detected and corrected?	-	Go to operation 20	Go to operation 19
13	Check the APP sensor 1 signal circuit for the following faults: Short circuit with "ground" Breakup High resistance Has the problem been detected and corrected?	-	Go to operation 20	Go to operation 19
14	Check the APP Sensor 2 5V reference circuit for the following conditions: Short circuit to voltage Short circuit with "ground" Breakup High resistance Has the problem been detected and corrected?	-	Go to operation 20	Go to operation 19
15	Test the APP Sensor 2 Low Reference Circuit for the following conditions: Short circuit to voltage Breakup High resistance Has the problem been detected and corrected?	-	Go to operation 20	Go to operation 19
16	Check the APP sensor 2 signal circuit for the following faults: Short circuit to voltage Has the problem been detected and corrected?	-	Go to operation 20	Go to operation 19
17	Check the APP Sensor 2 signal circuit for the following conditions: Short circuit with "ground" Breakup High resistance Has the problem been detected and corrected?	-	Go to operation 20	Go to operation 19
18	Note: The APP sensor cannot be repaired. Replace the accelerator pedal assembly. Has the replacement been made?	-	Go to operation 20	-
19	Replace the ECM. Has the replacement been made?	-	Go to operation 20	-
20	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Subject the vehicle to the conditions that cause the DTC to set. You can also subject the vehicle to the conditions that were observed from the Freeze Frame/Failure Records. DTC code showed misfire?	-	Go to operation 2	Go to operation 21
21	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P2264

DTC Description

DTC P2264 (00): Water in Fuel Sensor Circuit

Description of circuits/systems

There is a sensor mounted on the bottom of the fuel filter housing that detects water in the fuel. The ECM monitors the voltage on the water in fuel sensor signal circuit. If the voltage is incorrect, the ECM sets this DTC.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

The ECM detects a water in fuel sensor self-test signal error

Actions to Take When a DTC Sets

DTC P2264 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P2264 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

If an intermittent fault is suspected, See "Intermittent Fault Conditions".

DTC P2264

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Turn off the ignition. Disconnect the wiring harness connectors from the water in fuel sensor and from the ECM. Measure the voltage between the water in fuel sensor signal circuit and a good ground. Is the voltage less than the specified value?	0.3 V	Go to operation 3	Go to operation 7
3	Measure the resistance between the water in fuel sensor signal circuit and a good ground. Is the resistance higher than the specified value?	500 kOhm	Go to operation 4	Go to operation 8
4	Measure the resistance of the water in fuel sensor signal circuit between the connectors on the sensor and on the ECM. Is the resistance below the specified value?	5 Ohm	Go to operation 5	Go to operation 9
5	Connect the wiring harness connector to the ECM. Turn on the ignition, do not start the engine. Measure the voltage between the water in fuel sensor supply circuit and a good ground connection. Is the voltage higher than the specified value?	11 B	Go to operation 6	Go to operation 10
6	Measure the resistance between the water in fuel sensor ground circuit and a good ground connection. Is the resistance below the specified value?	5 Ohm	Go to operation 12	Go to operation 11
7	Repair short to power in water in fuel sensor signal circuit. Is the renovation complete?	-	Go to operation 13	-
8	Repair short to ground in water in fuel sensor signal circuit. Is the renovation complete?	-	Go to operation 13	-
9	Repair open circuit or high resistance in the water in fuel sensor signal circuit. Is the renovation complete?	-	Go to operation 13	-
10	Repair open circuit or high resistance in the water in fuel sensor supply voltage circuit. Is the renovation complete?	-	Go to operation 13	-
11	Repair open circuit or high resistance in the water in fuel sensor ground circuit. Is the renovation complete?	-	Go to operation 13	-
12	Replace the water in fuel sensor. Has the replacement been made?	-	Go to operation 13	-
13	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 14
14	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P2294

DTC Description

DTC P2294 (01): Fuel Pressure Regulator Solenoid 2 Control Circuit (short circuit to battery voltage)

DTC P2294 (02): Fuel Pressure Regulator Solenoid 2 Control Circuit (short circuit to ground)

DTC P2294 (04): Fuel Pressure Regulator Solenoid 2 Control Circuit (chain break)

DTC P2294 (54): Fuel Pressure Regulator Solenoid 2 Control Circuit (high temperature)

Description of circuits/systems

The fuel rail pressure (FRP) regulator is current-controlled. Due to its high intrinsic dynamics, the FRP solenoid valve is controlled by a high-frequency pulse-width-modulated signal (>1 kHz). Since the regulator winding in the fuel rail (FRP) changes its electrical resistance depending on temperature, the current value is measured and the change in electrical resistance is compensated for by adjusting the current.

This is accomplished using the so-called fuel rail pressure regulator (FRP) component former. The component former performs the following functions:

Measuring the current in the fuel rail pressure (FRP) regulator and monitoring the analog channel
Current regulation
Supplying pulse-width modulated control voltage to the fuel rail pressure (FRP) regulator and monitoring power stage errors

The Engine Control Module (ECM) supplies power and ground to the Fuel Rail Pressure (FRP) solenoid valve. The ECM monitors the current in the circuits to detect faults.

Conditions for Setting the DTC

P2294(01) and P2294(54)

The ignition switch is in the on position.
Fuel pressure regulator solenoid energized
Battery voltage is less than 16.5 V.

P2294(02) and P2294(04)

The ignition switch is in the on position.
Fuel pressure regulator solenoid is off
Battery voltage is less than 16.5 V.

Conditions for setting the fault code.

P2294(01)

There is a short circuit to battery voltage in the fuel pressure regulator solenoid control circuit

P2294(02)

There is a short to ground in the fuel pressure regulator solenoid control circuit

P2294(04)

There is an open in the fuel pressure regulator solenoid control circuit

P2294(54)

There is a high temperature in the fuel pressure regulator solenoid control circuit

Actions to Take When a DTC Sets

DTC P2294 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P2294 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Description of the test

The number below refers to the step numbers from the diagnostic table.

This step tests the battery voltage supply through the ECM to the fuel rail pressure (FRP) regulator.
This step tests for an open in the control circuit between the ECM and the fuel rail pressure (FRP) regulator.
This DTC can be set when voltage is applied between the ECM and the fuel rail pressure (FRP) regulator on the FRP regulator control circuit.

DTC P2294

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Try to start the engine. Does the engine start?	-	Go to operation 4	Go to operation 3
3	Turn off the ignition. Disconnect the engine control module (ECM) connectors. Disconnect the fuel rail pressure (FRP) regulator solenoid connector. Using a digital multimeter, measure the resistance between the fuel rail pressure sensor solenoid control circuit and ground. Is the measured resistance equal to the specified value?	?	Go to operation 12	Go to operation 9
4	Turn off the ignition. Disconnect the fuel rail pressure (FRP) regulator solenoid harness connector. Turn on the ignition with the engine off. Check the supply voltage circuit of the fuel rail pressure regulator solenoid using a test lamp connected to a reliable ground. Is the indicator light on?	-	Go to operation 5	Go to operation 7
5	Turn off the ignition. Make sure the fuel rail pressure (FRP) regulator solenoid harness connector is disconnected. Turn on the ignition with the engine off. Check the fuel rail pressure regulator solenoid control circuit with a test light connected to battery voltage. Is the indicator light on?	-	Go to operation 10	Go to operation 6
6	Disconnect the ECM harness connector that includes the fuel rail pressure (FRP) regulator solenoid control circuit. Turn on the ignition with the engine off. Using a digital multimeter, measure the voltage between the fuel rail pressure (FRP) regulator solenoid control circuit and a good ground. Is the measured voltage equal to the specified value?	0 B	Go to operation 13	Go to operation 8
7	Check for an open in the power supply circuit between the ECM and the fuel rail pressure (FRP) regulator solenoid. If a problem is detected, take steps to eliminate it. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 14
8	Repair short to battery voltage in the control circuit between the ECM and the fuel rail pressure (FRP) regulator solenoid. Is the renovation complete?	-	Go to operation 16	-
9	Check for a short to ground in the control circuit between the ECM and the fuel rail pressure (FRP) regulator solenoid. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 15
10	Test the ignition voltage, fuel rail pressure (FRP) regulator solenoid, and fuel rail pressure (FRP) regulator solenoid supply voltage circuits for high resistance. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 11
11	Check the fuel rail pressure (FRP) regulator solenoid for an intermittent or poor connection. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 12
12	Replace the fuel rail pressure (FRP) regulator. Has the replacement been made?	-	Go to operation 16	-
13	Check for an open in the control circuit between the ECM and the fuel rail pressure (FRP) regulator solenoid. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 14
14	Check the reliability of the ECM connections. If necessary, troubleshoot the wiring. Has the problem been detected and corrected?	-	Go to operation 16	Go to operation 15
15	Replace the ECM. Has the replacement been made?	-	Go to operation 16	-
16	Use a diagnostic tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 17
17	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P2510

DTC Description

DTC P2510 (58): Performance of the feedback of the ignition relay of the engine controls (incorrect reaction after an event)

DTC P2510 (59): Performance of the feedback of the ignition relay of the engine controls (circuit/component protection timeout)

Description of circuits/systems

When the ignition is turned on, the main relay is closed by hardware. As a result, the ECM is turned on. When the ignition is turned off, the main relay remains closed for a while so that the ECM can properly shut down. After the operation is completed, the main relay is opened by the appropriate software.

If the main relay does not switch off after the switch-off time of the control units has elapsed, or the main relay switches off before the switch-off time of the control units has elapsed, a diagnostic fault code is set.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P2510(58)

The ECM detects that the main relay is opening too early

P2510(59)

The ECM detects that the main relay is not opening in a timely manner

Actions to Take When a DTC Sets

DTC P2510 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P2510 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

If an intermittent fault is suspected, See "Intermittent Fault Conditions".
The main relay supply voltage circuit is electrically connected to the components listed below. Malfunctions in these circuits can cause this DTC to set.

Fuel filter heater relay
Glow Plug Control Circuit
Throttle actuator
Pressure boosting actuator
Camshaft Position Sensor (CMP)
Exhaust Gas Recirculation (EGR) Valve Solenoid
Cooling system fan relay
air conditioner compressor relay

DTC P2510

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Turn on the ignition. Read DTC information using a diagnostic tool. Are there any other DTCs set?	-	Jump to the appropriate diagnostic trouble code table	Go to operation 3
3	Turn off the ignition. Remove the main relay. Turn on the ignition. Using a digital multimeter, measure the voltage between the main relay control circuit and a good ground. Is the voltage less than the specified value?	0.3 V	Go to operation 4	Go to operation 8
4	Make sure the ignition is in the ON position. Using a digital multimeter, measure the voltage between the main relay's switched voltage supply circuit and a reliable ground. Is the voltage less than the specified value?	0.3 V	Go to operation 5	Go to operation 6
5	Turn off the ignition. Disconnect the wiring harness connector from the ECM. Using a digital multimeter, measure the electrical resistance between the main relay control circuit and a reliable ground. Is the resistance higher than the specified value?	500 kOhm	Go to operation 7	Go to operation 9
6	Check the main relay supply circuit for the following faults: Short circuit to voltage Short circuit with "ground" Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 10
7	Check the main relay control circuit for high resistance. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 10
8	Check the main relay control circuit for a short to battery voltage. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 10
9	Check the main relay control circuit for a short to ground. Has the problem been detected and corrected?	-	Go to operation 11	Go to operation 10
10	Replace the ECM. Has the replacement been made?	-	Go to operation 11	-
11	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 12
12	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P2544

DTC Description

DTC P2544 (72): Gearbox torque request circuit (invalid/not updated health monitor counter value)

DTC P2544 (74): Gearbox torque request circuit (incorrect calculated signal control value)

Description of circuits/systems

To improve shifter response, the TCM may request that the ECM reduce engine torque during shifts. When such a request is received, the ECM responds by retarding injection timing and notifying the TCM that the request was successful. If the ECM cannot comply with the request, it sends a message to the TCM that the request was not successful.

The torque reduction request is communicated to the ECM via the GMLAN communications network. When the TCM receives a message from the ECM that the torque reduction request has not been met, this DTC sets.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

P2544(72)

The ECM detects that the total number of rolling counter errors is greater than 3

P2544(74)

The ECM detects that the total number of control value errors is greater than 5

Actions to Take When a DTC Sets

DTC P2544 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P2544 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

DTC P2544

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Read DTC information using a diagnostic tool. Are there any DTCs other than P2544?	-	Jump to the appropriate diagnostic trouble code table	Go to operation 3
3	Clear DTC code. Turn off the ignition for at least 30 seconds. Test drive the vehicle under the conditions that caused this DTC to set. DTC P2544 cleared?	-	Go to operation 4	Go to item "Intermittent Fault Conditions"
4	Replace the gearbox controller. Has the replacement been made?	-	Go to operation 5	-
5	Using a scan tool, clear existing DTCs. Test drive the vehicle under the conditions that caused this DTC to set. Does the DTC code clear?	-	Go to operation 2	Go to operation 6
6	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code P2687

DTC Description

DTC P2687 (01): Fuel Heater Relay Control Circuit (short circuit to battery voltage)

DTC P2687 (02): Fuel Heater Relay Control Circuit (short circuit to ground)

DTC P2687 (04): Fuel Heater Relay Control Circuit (chain break)

DTC P2687 (54): Fuel Heater Relay Control Circuit (high temperature)

Description of circuits/systems

The engine control module (ECM) controls the supply voltage to the fuel heater by grounding the fuel heater relay control circuit through an internal semiconductor device called a driver. When the ECM commands the fuel heater relay to turn on, the control circuit voltage should be low, close to 0 volts. When the ECM commands the fuel heater relay to turn off, the control circuit potential should be high, close to battery voltage. If the ECM detects an abnormal circuit condition, a DTC will set.

Conditions for Setting the DTC

The ignition switch is in the on position.
Battery voltage is less than 16.5 V.

Conditions for setting the fault code.

P2687(01)

There is a short circuit to battery voltage in the fuel heater control circuit

P2687(02)

There is a short to ground in the fuel heater control circuit

P2687(04)

There is an open circuit in the fuel heater control circuit

P2687(54)

There is a high temperature in the fuel heater control circuit

Actions to Take When a DTC Sets

DTC P2687 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC P2687 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

For intermittent faults, See "Intermittent faults"
Since a faulty wiring connector can cause trouble codes to be set, always check the connectors associated with the diagnostic procedure for shorted terminals or poor wiring connections before replacing any components.

DTC P2687

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Disconnect the wiring harness connector from the PTC heater. Turn on the ignition with the engine off. Check the PTC heater supply voltage circuit with a test lamp connected to a good ground. Use the diagnostic tool to command the PTC heater relay on and off. Does the indicator light come on and go out according to each command?	-	Go to operation 3	Go to operation 4
3	Review the Freeze Frame Data for this DTC. Turn off the ignition for 30 seconds. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 4	Go to Diagnostic Information
4	Turn off the ignition. Disconnect the PTC heater relay. Turn on the ignition with the engine off. Check the PTC heater relay control circuit with a test lamp connected to the positive battery terminal Use the diagnostic tool to command the PTC heater to turn it on and off. Does the indicator light come on and go out when receiving on and off commands?	-	Go to operation 5	Go to operation 6
5	Connect a test lamp between the control circuit and the supply voltage circuit of the PTC heater relay. Use the diagnostic tool to command the PTC heater to turn it on and off. Does the indicator light come on and go out when receiving on and off commands?	-	Go to operation 7	Go to operation 9
6	Check the PTC heater relay control circuit for the following faults: Open circuit or increased resistance Short circuit to power supply Short to ground Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 8
7	Check the PTC heater relay for intermittent faults and poor contact. Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 10
8	Check for intermittent faults and loose connections at the ECM. Has the problem been detected and corrected?	-	Go to operation 12	Go to operation 11
9	Eliminate open circuit, high resistance or short circuit to ground in the PTC heater relay supply voltage circuit. Is the renovation complete?	-	Go to operation 12	-
10	Replace PTC heater relay. Has the replacement been made?	-	Go to operation 12	-
11	Replace the ECM. Has the replacement been made?	-	Go to operation 12	-
12	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Condition the vehicle for running the DTC. You can also condition the vehicle to run the conditions that were observed based on the recorded malfunction data. DTC code showed misfire?	-	Go to operation 2	Go to operation 13
13	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code (DTC) U0073

DTC Description

DTC U0073 (00): The communication bus with the control module is disabled

Description of circuits/systems

Serial channels of the GMLAN network are high-speed serial buses of the controller local area network (CAN), which transmit information between control modules. Typical data transfer rates should be high enough to ensure that the system responds in real time. This vehicle has 2 different types of serial GMLAN data transmission circuits - high-speed 2-wire circuits and low-speed single-wire circuits. The GMLAN serial data circuits are also directly connected to the Data Transmission System (DLC) connector. Messages are interpreted by an external connected CANdi module, which acts as a transceiver for the diagnostic instrument.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

The CAN controller is in the bus off state, OR
CAN controller is in DLL redefinition error state

Actions to Take When a DTC Sets

DTC U0073 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC U0073 is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

This DTC is not read with the current status. This DTC is diagnosed according to the symptom "No communication between the scan tool and the high speed GMLAN device". Refer to the appropriate procedure for the appropriate modules in the "Data Link Information" section.
An intermittent condition is most likely caused by a short in the GMLAN serial data circuits. Refer to the No Communication Between Scan Tool and High Speed GMLAN Device section to isolate the intermittent condition. Refer to the appropriate procedure for the appropriate modules in the Data Link Information section.

DTC U0073

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	See "No Communication Between Scan Tool and High Speed GMLAN Device"	-	-	-

Diagnostic Trouble Codes (DTC) U0101, U0102, U0104, U0121, U0140

DTC Description

DTC U0101 (00): Communication with the gearbox controller is broken

DTC U0101 (46): Communication with the gearbox controller is broken (vehicle configuration not programmed)

DTC U0102 (00): Communication with the transfer case control unit is broken

DTC U0102 (46): Communication with the transfer case control module has been lost (vehicle configuration not programmed)

DTC U0104 (00): Communication with the cruise control module has been lost

DTC U0121 (00): Communication with the anti-slip brake system (ABS) control module has been lost

DTC U0121 (71): Communication with the anti-slip brake system (ABS) control module has been lost (invalid data received on serial line)

DTC U0140 (00): Communication with the electronic body control unit has been interrupted

DTC U0140 (46): Communication with the electronic body control unit has been interrupted (vehicle configuration not programmed)

Description of circuits/systems

The modules connected to the high-speed and low-speed serial data circuits on the GMLAN monitor serial data communications during normal vehicle operation. The modules exchange operating information and commands with each other. The modules contain pre-recorded information about which messages are required to be exchanged on the serial data circuits for each virtual network. These messages are monitored and, in addition, some periodic messages are used by the receiving module as an indication of the presence of the transmitting module. Each message contains the identification number of the transmitting module.

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

U0101(00), U0102(00), U0104(00), U0121(00) and U0140(00)

No signal from the corresponding CAN network node

U0101(46)

Key message not received from TCM node

U0102(46)

No key message received from TCCM node

U0121(71)

The ECM detects that invalid control information has been received from the right and left drive wheels

U0140(46)

No key message received from BCM node

Actions to Take When a DTC Sets

DTCs U0101(00), U0102, U0104, U0121, and U0140 are Cnl type diagnostic trouble codes.
DTC U0101(46) is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTCs U0101(00), U0102, U0104, U0121, and U0140 are Cnl type diagnostic trouble codes.
DTC U0101(46) is a Type E diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Diagnostic information

This code may be caused by a poor connection on a faulty module.
A module that is not being supplied with power properly may cause this code to be set.
If there is no communication with multiple modules, select the module closest to the data link connector (DLC). Some modules may not have internal protection on some outputs, which may cause the fuse in the positive battery voltage or ignition voltage circuit to blow. If the input voltage fuse is open and no short is found in that circuit, verify that none of the module's output voltage circuits are shorted to ground before replacing the module. This diagnostic can be used on any module that must communicate serial data on the high or low speed GMLAN circuits, provided that the vehicle is equipped with the option that uses that module.

DTC U0101, U0102, U0104, U0121, U0140

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Check the following circuits of the module that cannot be contacted for an open or short to ground: Battery Positive Voltage Input Circuits Battery Positive Voltage Output Circuits Ignition Voltage Input Circuits Ignition voltage output circuits Battery positive voltage switching circuits Has the problem been detected and corrected?	-	Go to operation 7	Go to operation 3
3	Turn off the ignition. Check the grounding circuits of the module that cannot be contacted for an open circuit. Has the problem been detected and corrected?	-	Go to operation 7	Go to operation 4
4	Check the high speed GMLAN serial data circuit of the module that cannot communicate for an open. Has the problem been detected and corrected?	-	Go to operation 7	Go to operation 5
5	Inspect the wiring harness connectors of the module with which communication cannot be established for secure connections and tight contacts in the following circuits: Battery Positive Voltage Input Circuits Battery Positive Voltage Output Circuits Ignition Voltage Input Circuits Ignition voltage output circuits Switched battery positive voltage supply circuits Grounding circuits High-speed GMLAN serial data circuits Has the problem been detected and corrected?	-	Go to operation 7	Go to operation 6
6	Replace the module that cannot be contacted. Has the replacement been made?	-	Go to operation 7	-
7	Use a scan tool to clear DTC codes. Turn off the ignition for 30 seconds. Start the engine. Subject the vehicle to the conditions that cause the DTC to set. You can also subject the vehicle to the conditions that were observed from the Freeze Frame/Failure Records. DTC code showed misfire?	-	Go to operation 2	Go to operation 8
8	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal

Diagnostic Trouble Code (DTC) U2101

DTC Description

DTC U2101 (45): Maximum list of control modules not programmed (option not programmed)

Description of circuits/systems

Conditions for Setting the DTC

The ignition switch is in the on position.

Conditions for setting the fault code.

The EEPROM does not have a variant code programmed

Actions to Take When a DTC Sets

DTC U2101 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

Conditions for Clearing a DTC/Malfunction Indicator

DTC U2101 is a Cnl type diagnostic trouble code.

Cm. "Diagnostic Trouble Code Definitions"

DTC U2101

Step	Operation	Values	Yes	No
1	Have you performed a diagnostic system check?	-	Go to operation 2	Go to item "Checking the diagnostic system".
2	Connect the diagnostic tool. Turn on the ignition, do not start the engine. Use a scanning device to check the Subnet configuration parameters. Does this configuration match the actual configuration on the vehicle?	-	Go to operation 4	Go to operation 3
3	Perform vehicle configuration programming using a diagnostic tool. Has the setup been completed?	-	Go to operation 4	-
4	Using a scan tool, clear existing DTCs. Drive the vehicle within the conditions for setting this DTC as specified in the supporting text. Does the DTC code clear?	-	Go to operation 5	Go to operation 7
5	Replace the ECM. Has the replacement been made?	-	Go to operation 6	-
6	Using a scan tool, clear existing DTCs. Drive the vehicle within the conditions for these DTCs to appear as specified in the supporting text. Does the DTC code clear?	-	Go to operation 2	Go to operation 7
7	Check to see if any additional diagnostic trouble codes are set. Are there any DTCs that have not yet been diagnosed?	-	Jump to the appropriate diagnostic trouble code table	The system is normal