Sierra, Silverado 2006-2007

6.6L V8 VIN D Auto 3

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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

Possible Causes:

Inspect for any of the following conditions:



A crankcase overfill can cause oil to be forced through the positive crankcase ventilation (PCV) system.
 
An outside source that has allowed oil or fuel to enter the air induction system.
 
An aftermarket performance kit using an external fuel source.
 

Trouble Code: P0507



Idle Speed High

Possible Causes:

Inspect for any of the following conditions:



A crankcase overfill can cause oil to be forced through the positive crankcase ventilation (PCV) system.
 
An outside source that has allowed oil or fuel to enter the air induction system.
 
An aftermarket performance kit using an external fuel source.
 

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:



Inspect for a set/coast switch stuck in the engaged position or the signal circuit is shorted to voltage.
 
For an intermittent, 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 Random Access Memory (RAM) Failure (6L50/6L80/6L90)

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) Failure

Trouble Code: P0605



Control Module Programming Read Only Memory

Trouble Code: P0606



Control Module Internal Performance

Trouble Code: P0607



Control Module Performance

Trouble Code: P0608



Vehicle Speed Output Circuit

Possible Causes:



Important: Remove any debris from the PCM connector surfaces before servicing the PCM. Inspect the PCM connector gaskets when diagnosing/replacing the PCM. Ensure that the gaskets are installed correctly. The gaskets prevent water intrusion into the PCM. Using Freeze Frame and/or Failure Records data may aid in locating an intermittent condition. If you cannot duplicate the DTC, the information included in the Freeze Frame and/or Failure Records data can aid in determining how many miles since the DTC set. The Fail Counter and Pass Counter can also aid determining how many ignition cycles the diagnostic reported a pass and/or a fail. Operate the vehicle within the same freeze frame conditions (RPM, load, vehicle speed, temperature etc.) that you observed. This will isolate when the DTC failed. For an intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0609



Vehicle Speed Output Circuit 2

Possible Causes:

Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to the following:



Testing for Electrical Intermittents
 
Testing for Intermittent Conditions and Poor Connections
 
Wiring Repairs
 
Connector Repairs
 

Trouble Code: P060B



Control Module Analog to Digital Performance

Trouble Code: P0613



Transmission Control Module (TCM) Processor

Trouble Code: P061C



Control Module Engine Speed Performance

Trouble Code: P062C



Control Module Vehicle Speed Performance

Trouble Code: P062F



Control Module Long Term Memory Performance

Trouble Code: P0634



Transmission Control Module (TCM) Internal Temperature Too High

Possible Causes:



Clean the TCM if necessary. Excessive road debris will reduce the effectiveness of the heat sink on the TCM and could cause the internal temperature to rise.
 

Trouble Code: P0642



5-Volt Reference 1 Circuit Low Voltage

Trouble Code: P0643



5-Volt Reference 1 Circuit High Voltage

Trouble Code: P0646



Air Conditioning (A/C) Clutch Relay Control Circuit Low Voltage

Trouble Code: P0647



Air Conditioning (A/C) Clutch Relay Control Circuit High Voltage

Trouble Code: P064C



Glow Plug Module Control Performance

Trouble Code: P0650



Malfunction Indicator Lamp (MIL) Control Circuit

Possible Causes:



An intermittent or poor connection at the MIL control circuit in the inline harness connector may cause this DTC to set. Inspect the connector terminals for any condition that may result in excessive resistance. Refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0652



5 Volt Reference 2 Circuit Low Voltage

Trouble Code: P0653



5 Volt Reference 2 Circuit High Voltage

 
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