Sierra, Silverado 2006-2007

4.8L V8 VIN V Auto 4

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Trouble Code: P0443



Evaporative Emission (EVAP) Purge Solenoid Control Circuit

Trouble Code: P0446



Evaporative Emission (EVAP) Vent System Performance

Possible Causes:



When using the Evaporative Emission System Tester (EEST) to apply pressure, you can regulate the amount of pressure by activating the remote switch ON and OFF while observing pressure in the EVAP system using a scan tool. DO NOT use more than 5 inches H2O. More than 5 inches H2O applied to the EVAP system can cause the canister vent solenoid valve to temporarily remain in the closed position, which could lead to misdiagnosis in this procedure.
 
An intermittent condition could be caused by a damaged EVAP vent housing, a temporary blockage at the EVAP canister vent solenoid valve inlet, or a pinched vent hose. A blockage in the vent system will also cause a poor fuel fill problem.
 
For intermittent conditions, refer to Testing for Intermittent Conditions and Poor Connections .
 
An EVAP canister, vent hose, or vent solenoid valve that has restricted flow may cause this DTC to set. Using a purge solenoid valve command with a scan tool will allow vacuum to 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, vacuum should not increase to more than 9 inches H2O.
 

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, this code can set. When pressure is applied to the system and released, a properly operating system will return to the atmospheric pressure rapidly. By using a scan tool and the J 41413-200 Evaporative Emission System Tester (EEST), pressure can be applied to the system, then released, while monitoring the FTP sensor parameter to see that pressure can be released within 30 seconds.
 
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.
 
A full fuel tank may cause misdiagnosis.
 
When using the electronic emission system tester (EEST) to apply pressure, you can regulate the amount of pressure by activating the remote switch ON and OFF while observing pressure in the EVAP system using a scan tool.
 

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:



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 20 percent, then plot the data to look for non-linear sensor operation. A similar inspection can be done for the pressure side of the sensor range by applying pressure with J 41413-200 Evaporative Emission System Tester (EEST) while taking a snapshot. DO NOT exceed 5 inches H2O when applying pressure.
 

Trouble Code: P0455



Evaporative Emission (EVAP) System Large Leak Detected

Possible Causes:



A fuel fill cap that is left OFF after a fuel fill will cause this DTC to set.
 
A loose, missing, or damaged fuel fill cap can cause this DTC to set.
 
A blockage or restriction in the EVAP purge solenoid, purge pipe EVAP canister, or vapor pipe, can cause this DTC to set.
 
A temporary blockage in the EVAP purge solenoid, purge pipe, or EVAP canister could cause an intermittent condition. Inspect and repair any restriction in the EVAP system.
 
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 .
 
To improve the visibility of the smoke exiting the EVAP system, observe the suspected leak area from different angles with the J 41413-SPT .
 
Observe the Freeze Frame/Failure Records vehicle mileage since the diagnostic test last failed may help determine how often the condition occurs that caused the DTC to set . This may assist in diagnosing the condition.
 

Trouble Code: P0461



Fuel Level Sensor 1 Performance

Possible Causes:



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

Trouble Code: P0461



Fuel Level Sensor 1 Performance

Possible Causes:



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

Trouble Code: P0462



Fuel Level Sensor 1 Circuit Low Voltage

Possible Causes:



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

Trouble Code: P0462



Fuel Level Sensor 1 Circuit Low Voltage

Possible Causes:



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

Trouble Code: P0463



Fuel Level Sensor 1 Circuit High Voltage

Possible Causes:



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

Trouble Code: P0463



Fuel Level Sensor 1 Circuit High Voltage

Possible Causes:



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

Trouble Code: P0464



Fuel Level Sensor 1 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 .
 

Trouble Code: P046C



Exhaust Gas Recirculation (EGR) Position Sensor Performance

Trouble Code: P0496



Evaporative Emission (EVAP) System Flow During Non-Purge

Trouble Code: P0502



Vehicle Speed Sensor (VSS) Circuit Low Voltage

Trouble Code: P0503



Vehicle Speed Sensor (VSS) Circuit Intermittent

Possible Causes:



Inspect for ABS DTCs. A faulty ABS condition may contribute to setting DTC P0503.
 

Trouble Code: P0504



Brake Switch Circuit 1-2 Correlation

Possible Causes:



Aftermarket trailer brake controllers must be disconnected before diagnosing DTC P0504 due to they could result in incorrect diagnostics.
 
Check for intermittents and poor connections. Refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0506



Idle Speed Low

Trouble Code: P0507



Idle Speed High

Trouble Code: P0522



Engine Oil Pressure (EOP) Sensor Circuit Low Voltage

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. Refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0523



Engine Oil Pressure (EOP) Sensor Circuit High Voltage

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 in determining how many miles since the DTC set. The Fail Counter and the Pass Counter can help determine how many ignition cycles that the diagnostic test reported a pass and/or a fail. Refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0530



Air Conditioning Refrigerant Pressure Sensor Circuit

Possible Causes:



For an intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0532



Air Conditioning Refrigerant Pressure Sensor Circuit

Possible Causes:



For an intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0533



Air Conditioning Refrigerant Pressure Sensor Circuit

Possible Causes:



For an intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0540



Intake Air (IA) Heater Feedback Circuit

Trouble Code: P0561



System Voltage Unstable

Possible Causes:



Inspect for aftermarket devices that could affect the operation of the starting and charging systems.
 
Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.Inspect for the presence of aftermarket accessories, such as a remote starter, etc. Depending on how these aftermarket accessories are installed, they may interfere with the required voltage for proper operation of the transmission.
 

Trouble Code: P0562



System Voltage Low

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.Inspect the batteries for proper voltage.Inspect the charging system for proper operation.You may have to drive the vehicle in order to experience a condition.Inspect for the presence of aftermarket accessories, such as remote starters, etc. Depending on how these aftermarket accessories are installed, they may interfere with the required voltage for proper operation of the transmission.
 

Trouble Code: P0563



System Voltage High

Possible Causes:



Inspect the wiring for poor electrical connections at the TCM. Inspect for the following conditions:

A bent terminal
 
A backed-out terminal
 
A damaged terminal
 
Poor terminal tension
 
A chafed wire
 
A broken wire inside the insulation
 

When diagnosing for an intermittent short or open, massage the wiring harness while watching the test equipment for a change.You may have to drive the vehicle in order to experience a condition.Inspect for the presence of aftermarket accessories, such as a remote starter, etc. Depending on how these aftermarket accessories are installed, they may interfere with the required voltage for proper operation of the transmission.
 

Trouble Code: P0567



Cruise Control Resume Switch Circuit

Possible Causes:



Ensure that the Resume/Accel switch is not stuck or sticking in the engaged position.
 
For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0568



Cruise Control Set Switch Circuit

Possible Causes:



Ensure that the Set/Coast switch is not stuck or sticking in the engaged position.
 
For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0571



Cruise Control Brake Switch Circuit

Possible Causes:



Refer to Exterior Lighting Systems Description and Operation in order to avoid a misdiagnosis.
 
For an intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0601



Control Module Read Only Memory (ROM)

Trouble Code: P0602



Control Module Not Programmed

Trouble Code: P0603



Control Module Random Access Memory (RAM) Failure (6L50/6L80/6L90)

Trouble Code: P0604



Control Module Random Access Memory (RAM)

Trouble Code: P0605



Control Module Programming Read Only Memory

Trouble Code: P0606



Control Module Internal Performance

 
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