CTS 2006-2007, CTS-V 2005-2007, DTS 2006-2007

4.6L V8 VIN 9 Auto 4

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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 9 inches H2O.
 
Ensure that the reference port on the FTP sensor is unobstructed.
 

Trouble Code: P0451



Fuel Tank Pressure (FTP) Sensor Performance

Possible Causes:

P0451 and P0454



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.
 
Ensure that the reference port on the FTP sensor is unobstructed.
 
An FTP sensor that is skewed or does not have a linear transition from low to high may cause this code to set. Scan tool output controls, snapshot, and plot functions can help detect erratic sensor response. To test the sensor signal under vacuum conditions, use the Quick Snapshot and the Purge/Seal functions to capture data while commanding purge to 20 percent, then plot the data to look for erratic sensor operation. A similar test can be done for the pressure side of the sensor operation by applying pressure with the J 41413-200 while taking a snapshot.
 

Trouble Code: P0452



Fuel Tank Pressure (FTP) Sensor Circuit Low Voltage

Trouble Code: P0452



Fuel Tank Pressure (FTP) Sensor Circuit Low Voltage

Possible Causes:

P0451 and P0454



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.
 
Ensure that the reference port on the FTP sensor is unobstructed.
 
An FTP sensor that is skewed or does not have a linear transition from low to high may cause this code to set. Scan tool output controls, snapshot, and plot functions can help detect erratic sensor response. To test the sensor signal under vacuum conditions, use the Quick Snapshot and the Purge/Seal functions to capture data while commanding purge to 20 percent, then plot the data to look for erratic sensor operation. A similar test can be done for the pressure side of the sensor operation by applying pressure with the J 41413-200 while taking a snapshot.
 

Trouble Code: P0453



Fuel Tank Pressure (FTP) Sensor Circuit High Voltage

Trouble Code: P0453



Fuel Tank Pressure (FTP) Sensor Circuit High Voltage

Possible Causes:

P0451 and P0454



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.
 
Ensure that the reference port on the FTP sensor is unobstructed.
 
An FTP sensor that is skewed or does not have a linear transition from low to high may cause this code to set. Scan tool output controls, snapshot, and plot functions can help detect erratic sensor response. To test the sensor signal under vacuum conditions, use the Quick Snapshot and the Purge/Seal functions to capture data while commanding purge to 20 percent, then plot the data to look for erratic sensor operation. A similar test can be done for the pressure side of the sensor operation by applying pressure with the J 41413-200 while taking a snapshot.
 

Trouble Code: P0454



Fuel Tank Pressure (FTP) Sensor 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 while taking a snapshot.
 
Ensure that the reference port on the FTP sensor is unobstructed.
 

Trouble Code: P0454



Fuel Tank Pressure (FTP) Sensor Intermittent

Possible Causes:

P0451 and P0454



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.
 
Ensure that the reference port on the FTP sensor is unobstructed.
 
An FTP sensor that is skewed or does not have a linear transition from low to high may cause this code to set. Scan tool output controls, snapshot, and plot functions can help detect erratic sensor response. To test the sensor signal under vacuum conditions, use the Quick Snapshot and the Purge/Seal functions to capture data while commanding purge to 20 percent, then plot the data to look for erratic sensor operation. A similar test can be done for the pressure side of the sensor operation by applying pressure with the J 41413-200 while taking a snapshot.
 

Trouble Code: P0455



Evaporative Emission (EVAP) System Large Leak

Possible Causes:



A loose, missing, incorrect, or damaged fuel fill cap may cause this DTC to set.
 
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 . 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.
 
To improve the visibility of the smoke exiting the EVAP system, observe the suspected leak area from different angles with the J 41413-SPT .
 

Trouble Code: P0461



Fuel Level Sensor Circuit Performance

Trouble Code: P0462



Fuel Level Sensor Circuit Low Voltage

Trouble Code: P0463



Fuel Level Sensor Circuit High Voltage

Trouble Code: P0464



Fuel Level Sensor Circuit Intermittent

Possible Causes:



Using the Failure Records data may help locate an intermittent condition. If you cannot duplicate the DTC, the information in the Failure Records can help determine how many miles since the DTC set. The Fail Counter and Pass Counter can help determine how many ignition cycles that the diagnostic test reported a pass and/or a fail.
 

Trouble Code: P0464



Fuel Level Sensor Circuit Intermittent

Trouble Code: P0480



Cooling Fan Relay 1 Control Circuit

Possible Causes:



Review the Freeze/Failure Records vehicle mileage since the diagnostic test failed. This may help determine how often the condition that caused the DTC to be set occurs.
 

Trouble Code: P0480



Cooling Fan Relay 1 Control Circuit

Trouble Code: P0481



Cooling Fan Relay 2 Control Circuit

Possible Causes:



Review the Freeze/Failure Records vehicle mileage since the diagnostic test failed. This may help determine how often the condition that caused the DTC to be set occurs.
 

Trouble Code: P0481



Cooling Fan Relay 2 Control Circuit

Trouble Code: P0496



Evaporative Emission System Flow During Non-Purge

Trouble Code: P0506



Idle Speed Low

Trouble Code: P0507



Idle Speed High

Trouble Code: P0513



Theft Deterrent Key Incorrect

Possible Causes:



The "key" referenced in the DTC descriptor does not refer to the vehicle key. In this case, "key" is referring to the challenge response.
 

Trouble Code: P0520



Engine Oil Pressure (EOP) Sensor Circuit

Trouble Code: P0532



Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit Low Voltage

Possible Causes:

Test the following conditions:



Visually inspect the sensor for contamination or damage.
 
Inspect for the following that may affect the sensors accuracy:

A malfunction within the refrigerant system causing low pressure
 
Visually inspect the A/C components and lines for damage.
 

Refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0533



Air Conditioning (A/C) Refrigerant Pressure Sensor Circuit High Voltage

Possible Causes:

Test the following conditions:



Visually inspect the sensor for contamination or damage.
 
Inspect for the following that may affect the sensors accuracy:

A malfunction within the refrigerant system causing low pressure
 
Visually inspect the A/C components and lines for damage.
 

Refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0562



System Voltage Low

Trouble Code: P0563



System Voltage High

Trouble Code: P0572



Brake Switch Circuit 1 Low Voltage

Possible Causes:



Verify that the BPPS is properly calibrated.
 

Trouble Code: P0572



Brake Switch Circuit 1 Low Voltage

Trouble Code: P0573



Brake Switch Circuit 1 High Voltage

Possible Causes:



Verify that the BPPS is properly calibrated.
 

Trouble Code: P0573



Brake Switch Circuit 1 High Voltage

Trouble Code: P0575



Cruise Control Switch Signal Circuit

Possible Causes:



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

Trouble Code: P0601



Control Module Read Only Memory (ROM)

Trouble Code: P0601



Transmission Control Module (TCM) Read Only Memory (ROM)

Trouble Code: P0602



Control Module Not Programmed

Trouble Code: P0602



Transmission Control Module (TCM) Not Programmed

Trouble Code: P0603



Control Module Long Term Memory Reset

Trouble Code: P0603



Transmission Control Module (TCM) Long Term Memory Reset

Trouble Code: P0604



Control Module Random Access Memory (RAM)

 
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