Cobalt 2006-2008, G5 2007

2.0L L4 VIN P Std 2

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Trouble Code: P0201



Injector 1 Control Circuit

Possible Causes:



Performing the Fuel Injector Coil Test may help isolate an intermittent condition. Refer to Fuel Injector Diagnosis .
 
For an intermittent condition, refer to Intermittent Conditions .
 

Trouble Code: P0202



Injector 2 Control Circuit

Possible Causes:



Performing the Fuel Injector Coil Test may help isolate an intermittent condition. Refer to Fuel Injector Diagnosis .
 
For an intermittent condition, refer to Intermittent Conditions .
 

Trouble Code: P0203



Injector 3 Control Circuit

Possible Causes:



Performing the Fuel Injector Coil Test may help isolate an intermittent condition. Refer to Fuel Injector Diagnosis .
 
For an intermittent condition, refer to Intermittent Conditions .
 

Trouble Code: P0204



Injector 4 Control Circuit

Possible Causes:



Performing the Fuel Injector Coil Test may help isolate an intermittent condition. Refer to Fuel Injector Diagnosis .
 
For an intermittent condition, refer to Intermittent Conditions .
 

Trouble Code: P0218



Transmission Condition Overtemperature

Possible Causes:



Ask the customer about overloading the vehicle, exceeding the trailer-towing limit, or towing in Overdrive.
 

Trouble Code: P0220



Throttle Position (TP) Sensor 2 Circuit

Trouble Code: P0222



Throttle Position (TP) Sensor 2 Circuit Low Voltage

Trouble Code: P0223



Throttle Position (TP) Sensor 2 Circuit High Voltage

Trouble Code: P0230



Fuel Pump Relay Control Circuit

Trouble Code: P023A



Charge Air Cooler (CAC) Coolant Pump Relay Control Circuit

Trouble Code: P0300



Engine Misfire Detected

Possible Causes:



You must perform the CKP system variation learn procedure before proceeding with the diagnostic table. Refer to Crankshaft Position System Variation Learn .
 

Trouble Code: P0315



Crankshaft Position (CKP) System Variation Not Learned

Trouble Code: P0325



Knock Sensor (KS) Circuit

Trouble Code: P0326



Knock Sensor (KS) Performance

Trouble Code: P0327



Knock Sensor (KS) Circuit Low Voltage

Possible Causes:



Inspect the KS for physical damage. A KS that is dropped or damaged may cause a DTC to set.
 
Inspect the KS for proper installation. A KS that is loose or over torqued may cause a DTC to set. The KS should be free of thread sealant. The KS mounting surface should be free of burrs, casting flash, and foreign material.
 
The KS must be clear of hoses, brackets, and engine electrical wiring.
 
For an intermittent condition, refer to Intermittent Conditions .
 

Trouble Code: P0335



Crankshaft Position (CKP) Sensor Circuit

Possible Causes:

For an intermittent condition, the vehicle may need to be operated within the conditions captured in the Freeze Frame/Failure Records. Inspect for one of the following conditions, if the code does set intermittently while operating within the conditions captured in the Freeze Frame/Failure Records. If one of the following conditions are not present, refer to Intermittent Conditions for inspections that would help aid in diagnosing an intermittent condition.



Damage to the CKP reluctor wheel
 
Incorrect sensor installation
 
The sensor coming in contact with the CKP reluctor wheel
 
A cracked or damaged sensor
 
Foreign material passing between the sensor and the CKP reluctor wheel
 

Trouble Code: P0336



Crankshaft Position (CKP) Sensor Performance

Trouble Code: P0340



Camshaft Position (CMP) Sensor Circuit

Trouble Code: P0341



Camshaft Position (CMP) Sensor Performance

Trouble Code: P0351



Ignition Coil 1 Control Circuit

Trouble Code: P0352



Ignition Coil 2 Control Circuit

Trouble Code: P0353



Ignition Coil 3 Control Circuit

Trouble Code: P0354



Ignition Coil 4 Control Circuit

Trouble Code: P0420



Catalyst System Low Efficiency

Trouble Code: P0442



Evaporative Emission (EVAP) System Small Leak Detected

Possible Causes:



A leak in the EVAP system can be verified by the use of the flow meter on the J 41413-200 Evaporative Emissions System Tester (EEST). Refer to J 41413-200 operation manual for flow meter use.
 
To help locate intermittent leaks, use the J 41413-200 to introduce smoke into the EVAP system. Move all EVAP components while observing smoke with the J 41413-SPT High Intensity White Light.
 
To improve the visibility of the smoke exiting the EVAP system, observe the suspected leak area from different angles with the J 41413-SPT .
 
A condition may exist where a leak in the EVAP system only exists under a vacuum condition. By using the scan tool Purge/Seal function to create a vacuum, seal the system and observe the FTP parameter for vacuum decay, this type of leak may be detected.
 
For intermittent conditions, refer to Intermittent Conditions .
 
Introducing smoke in 15-second intervals may allow smaller leak areas to be more noticeable. When the system is less pressurized, the smoke will sometimes escape in a more condensed manner.
 

Trouble Code: P0443



Evaporative Emissions (EVAP) Purge Solenoid Control Circuit

Trouble Code: P0446



Evaporative Emissions (EVAP) Vent System Performance

Possible Causes:



The EVAP system tests run when the engine is first started and meets the Conditions for Running the DTC. An intermittent condition could be caused by a damaged EVAP vent housing, a temporary blockage at the EVAP canister vent inlet, or a pinched vent hose. A blockage in the vent system will also cause a poor fuel fill condition.
 
An EVAP canister, vent hose, or vent solenoid valve that has restricted flow may cause this DTC to set. Using a purge solenoid command with a scan tool will allow vacuum to be applied to the system instead of pressure. With the engine running, the EVAP canister vent solenoid valve open and the EVAP canister purge solenoid valve commanded to 100 percent, the fuel tank vacuum should not increase to more than 5 inches H2O.
 
An EVAP canister filter that is restricted can cause this DTC to set. Refer to Evaporative Emission (EVAP) Canister Filter Replacement and Evaporative Emission (EVAP) System Cleaning .
 
Disconnecting one component at a time while the EVAP system is under flow will help to pinpoint a restriction in the system.
 
Reviewing the Failure Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.
 
For intermittent conditions, refer to Intermittent Conditions .
 

Trouble Code: P0449



Evaporative Emission (EVAP) Vent Solenoid Control Circuit

Trouble Code: P0451



Fuel Tank Pressure (FTP) Sensor Performance

Possible Causes:



A restriction in the EVAP canister or vent lines could prevent fuel vapor pressure from bleeding off fast enough. If the vent system cannot bleed off pressure fast enough, the re-zero procedure may not complete successfully, which could cause this code to set.
 
By using the purge solenoid command on a scan tool, vacuum can be applied to the system instead of pressure. With the EVAP canister vent solenoid valve open and the EVAP canister purge solenoid valve commanded to 100 percent, the vacuum should not increase to more than 6 inches H2O.
 
An EVAP canister filter that is restricted can cause this DTC to set. Refer to Evaporative Emission Canister Filter Replacement .
 
For intermittent conditions, refer to Intermittent Conditions .
 
Ensure that the reference port on the FTP sensor is unobstructed.
 

Trouble Code: P0452



Fuel Tank Pressure (FTP) Sensor Circuit Low Voltage

Trouble Code: P0453



Fuel Tank Pressure (FTP) Sensor Circuit High Voltage

Trouble Code: P0454



Fuel Tank Pressure (FTP) Sensor Circuit Intermittent

Possible Causes:



This diagnostic is designed to detect an unexpected abrupt voltage signal change from the FTP.
 
Scan tool output controls, snapshot, and plot functions can help detect erratic sensor response. To look at the sensor signal under vacuum conditions, use snapshot and the purge/seal function to capture data while commanding purge to 30 percent, and then plot the data to look for erratic sensor operation. A similar inspection can be done for the pressure side of the sensor range by applying pressure with the J 41413-200 Evaporative Emissions System Tester (EEST) while taking a snapshot.
 
Ensure that the reference port on the FTP sensor is unobstructed.
 
For intermittent conditions, refer to Intermittent Conditions .
 

Trouble Code: P0455



Evaporative Emission (EVAP) System Large Leak

Possible Causes:



To help locate intermittent leaks, use the J 41413-200 Evaporative Emissions System Tester (EEST) to introduce smoke into the EVAP system. Move all EVAP components while observing smoke with aJ 41413-SPT High Intensity White Light. Introducing smoke in 15-second intervals will allow less pressure into the EVAP system. When the system is less pressurized, the smoke will sometimes escape in a more condensed manner.
 
A temporary blockage in the EVAP canister purge solenoid valve, purge pipe or EVAP canister could cause an intermittent condition. Inspect and repair any restriction in the EVAP system.
 
To improve the visibility of the smoke exiting the EVAP system, observe the suspected leak area from different angles with a J 41413-SPT .
 
Reviewing the Failure Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.
 
For intermittent conditions, refer to Intermittent Conditions .
 

Trouble Code: P0461



Fuel Level Sensor Performance

Possible Causes:



Use the Freeze Frame and/or Failure Records data in order to locate an intermittent condition. If you cannot duplicate the DTC, the information included in the Freeze Frame and/or Failure Records data may aid in determining the number of miles since the DTC set. The Fail Counter and Pass Counter can also aid in determining the number of ignition cycles that the diagnostic reported a pass and/or fail. Operate the vehicle within the same Freeze Frame conditions, i.e. RPM, engine load, vehicle speed, temperature, etc. This will isolate when the DTC failed. Refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0461



Fuel Level Sensor Circuit Performance

Trouble Code: P0462



Fuel Level Sensor Circuit Low Voltage

Possible Causes:



Use the Freeze Frame and/or Failure Records data in order to locate an intermittent condition. If you cannot duplicate the DTC, the information included in the Freeze Frame and/or Failure Records data may aid in determining the number of miles since the DTC set. The Fail Counter and Pass Counter can also aid in determining the number of ignition cycles that the diagnostic reported a pass and/or fail. Operate the vehicle within the same Freeze Frame conditions, i.e. RPM, engine load, vehicle speed, temperature, etc. This will isolate when the DTC failed. Refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0462



Fuel Level Sensor Circuit Low Voltage

Trouble Code: P0463



Fuel Level Sensor Circuit High Voltage

Possible Causes:



Use the Freeze Frame and/or Failure Records data in order to locate an intermittent condition. If you cannot duplicate the DTC, the information included in the Freeze Frame and/or Failure Records data may aid in determining the number of miles since the DTC set. The Fail Counter and Pass Counter can also aid in determining the number of ignition cycles that the diagnostic reported a pass and/or fail. Operate the vehicle within the same Freeze Frame conditions, i.e. RPM, load, vehicle speed, temperature, etc. This will isolate when the DTC failed. Refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0463



Fuel Level Sensor Circuit High Voltage

Trouble Code: P0464



Fuel Level Sensor Circuit Intermittent

Possible Causes:



Use the Freeze Frame and/or Failure Records data in order to locate an intermittent condition. If you cannot duplicate the DTC, the information included in the Freeze Frame and/or Failure Records data may aid in determining the number of miles since the DTC set. The Fail Counter and Pass Counter can also aid in determining the number of ignition cycles that the diagnostic reported a pass and/or fail. Operate the vehicle within the same freeze frame conditions, i.e. RPM, engine load, vehicle speed, temperature, etc. This will isolate when the DTC failed.
 
Refer to Testing for Intermittent Conditions and Poor Connections .
 
If the DTC sets without a refueling event, refer to Fuel Gage Inaccurate or Inoperative .
 

 
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