Sierra, Silverado 2006-2007

6.0L V8 VIN U Auto 4

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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

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: P0613



Transmission Control Module (TCM) Processor

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: P0641



5-Volt Reference 1 Circuit

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: P0650



Malfunction Indicator Lamp (MIL) Control Circuit

Trouble Code: P0651



5-Volt Reference 2 Circuit

Trouble Code: P0654



Engine 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: P0658



Actuator Supply Voltage 1 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.
 
You may have to drive the vehicle in order to experience a condition.
 

Trouble Code: P0659



Actuator Supply Voltage 1 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.
 

Trouble Code: P0667



Transmission Control Module (TCM) Temperature Sensor Performance

Possible Causes:



Reprogram the TCM and retest the DTC to see if the DTC resets. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection before replacing the control solenoid (w/body and TCM) valve assembly.
 

Trouble Code: P0668



Transmission Control Module (TCM) Temperature Sensor Circuit Low Voltage

Possible Causes:



Reprogram the TCM and retest the DTC to see if the DTC resets. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection before replacing the control solenoid (w/body and TCM) valve assembly.
 

Trouble Code: P0669



Transmission Control Module (TCM) Temperature Sensor Circuit High Voltage

Possible Causes:



Reprogram the TCM and retest the DTC to see if the DTC resets. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection before replacing the control solenoid (w/body and TCM) valve assembly.
 

Trouble Code: P0700



Transmission Control Module (TCM) Requested MIL Illumination

Trouble Code: P0701



Transmission Control System Performance

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.DTC P0701 may be logged if a forward or REVERSE range is selected immediately after the engine is started, and before the TCM detects pressure at the switches, 2-6 seconds after the engine starts.A plugged control main filter may cause DTC P0701 to set.
 

Trouble Code: P0703



Brake Switch Circuit

Possible Causes:

DTC P0703 indicates that the TCM did not see the proper input signal for service brake status during an acceleration or deceleration cycle. This may indicate an open or short in the TCC brake switch/cruise control release circuit or a faulty stop lamp switch.



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.
 

Trouble Code: P0706



Transmission Range (TR) Switch Performance

Trouble Code: P0708



Transmission Range (TR) Sensor Circuit High

Possible Causes:

Important: Due to the TCM logic used to detect and set DTC P0708, this code can remain active even after an IMS switch replacement is complete and the ignition has been cycled. Therefore, always clear all active DTCs from the TCM after servicing the IMS switch.



Inspect the wiring for poor electrical connections at the TCM and powertrain control module (PCM). 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.Due to this failure and associated response, DTC P0722 can also set.When monitoring "TR SW" while moving the selector through ranges, A/B/C/P states may indicate transitional states. Transitional states are the area between ranges.TR SW A/B/C/P may indicate invalid states when selecting ranges. Invalid states confirm a concern is present.
 

Trouble Code: P0711



Transmission Fluid Temperature (TFT) Sensor Performance

Trouble Code: P0712



Transmission Fluid Temperature (TFT) Sensor Circuit Low Voltage

Possible Causes:



The scan tool displays the transmission fluid temperature in degrees. After the transmission is operating, the fluid temperature should rise steadily to a normal operating temperature, then stabilize.
 
Verify the customer's driving habits, trailer towing, etc. Trailer towing should occur in D3.
 

Trouble Code: P0713



Transmission Fluid Temperature (TFT) Sensor Circuit High Voltage

Trouble Code: P0716



Input Speed Sensor Performance

Possible Causes:



DTC P0716 defaults to an elevated line pressure condition which may result in partial torque converter clutch (TCC) apply. This may produce an idle surge that could stall the engine.
 

Trouble Code: P0717



Input Speed Sensor Circuit Low Voltage

Possible Causes:



DTC P0717 defaults to an elevated line pressure condition which may result in partial torque converter clutch (TCC) apply. This may produce an idle surge that could stall the engine.
 

Trouble Code: P0719



Brake Switch Circuit Low Voltage

Possible Causes:



Inspect the brake switch for proper mounting and operation.
 
Inspect for ABS DTCs. A faulty ABS condition may contribute to setting DTC P0719.
 

Trouble Code: P0719



TCC Brake Switch Circuit Low Voltage

Possible Causes:



Inspect the TCC brake switch for proper mounting and operation.
 
Inspect for ABS DTCs. A faulty ABS condition may contribute to setting DTC P0719.
 

Trouble Code: P0721



Output Speed Sensor Circuit Performance

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.If the condition is intermittent, connect the scan tool and select the speed sensor indicated by the code. If the signal is erratic, investigate and eliminate the following:

Intermittent wiring connection
 
Excessive vibration, such as driveline or engine torsionals
 
Irregular sensor gap, such as a loose sensor, a loose tone wheel or a damaged tone wheel
 
Inspect that the speed sensor wiring consists of twisted pairs at the rate of 12-16 twists per 300 mm (12 in). These twists must extend the entire length of the wiring harness to within at least 50 mm (2 in) of the speed sensor connector.
 

 

Trouble Code: P0722



Output Speed Sensor Circuit No Signal

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.If the condition is intermittent, connect the scan tool and select the speed sensor indicated by the code. If the signal is erratic, investigate and eliminate the following:

Intermittent wiring connection
 
Excessive vibration, such as driveline or engine torsionals
 
Irregular sensor gap, such as a loose sensor, a loose tone wheel or a damaged tone wheel
 
Inspect that the speed sensor wiring consists of twisted pairs at the rate of 12-16 twists per 300 mm (12 in). These twists must extend the entire length of the wiring harness to within at least 50 mm (2 in) of the speed sensor connector.
 

 

Trouble Code: P0723



Output Speed Sensor (OSS) Intermittent

Possible Causes:



Inspect the OSS, harness, connector and control solenoid (w/body and TCM) valve assembly pins for metallic debris and output shaft machined face for damage or misalignment. Proper torque of the OSS mounting bolt is critical to proper OSS operation. Use the J 35616 GM-approved terminal test kit for any test that requires probing the control solenoid (w/body and TCM) valve assembly harness connector or a component harness connector.
 

Trouble Code: P0724



Brake Switch Circuit High Voltage

Possible Causes:



Inspect the brake switch for proper mounting and operation.
 
Inspect for ABS DTCs. A faulty ABS condition may contribute to setting DTC P0724.
 

Trouble Code: P0724



TCC Brake Switch Circuit High Voltage

Possible Causes:



Inspect the TCC brake switch for proper mounting and operation.
 
Inspect for ABS DTCs. A faulty ABS condition may contribute to setting DTC P0724.
 

Trouble Code: P0726



Engine Speed Sensor Circuit Performance

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.If the condition is intermittent, connect the scan tool and select the speed sensor indicated by the code. If the signal is erratic, investigate and eliminate the following:

Intermittent wiring connection
 
Excessive vibration, such as driveline or engine torsionals
 
Irregular sensor gap, such as a loose sensor, a loose tone wheel or a damaged tone wheel
 
Inspect that the speed sensor wiring consists of twisted pairs at the rate of 12-16 twists per 300 mm (12 in). These twists must extend the entire length of the wiring harness to within at least 50 mm (2 in) of the speed sensor connector.
 

 

Trouble Code: P0727



Engine Speed Sensor Circuit No Signal

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.If the condition is intermittent, connect the scan tool and select the speed sensor indicated by the code. If the signal is erratic, investigate and eliminate the following:

Intermittent wiring connection
 
Excessive vibration, such as driveline or engine torsionals
 
Irregular sensor gap, such as a loose sensor, a loose tone wheel or a damaged tone wheel
 
Inspect that the speed sensor wiring consists of twisted pairs at the rate of 12-16 twists per 300 mm (12 in). These twists must extend the entire length of the wiring harness to within at least 50 mm (2 in) of the speed sensor connector.
 

 

Trouble Code: P0729



Incorrect 6th Gear Ratio

Possible Causes:



Incorrect ratio codes typically indicate mechanical conditions with specific clutches, such as 2-6 clutch and 3-5-6-REVERSE clutch for 6th range.
 
Incorrect ratio code could indicate a hydraulically failed solenoid. Observe DTC information for the specific solenoid.
 
Clutch test mode can be used to measure stall speed. Observe turbine speed signal. If the turbine speed signal does not return to zero or rises during the stall test, a leak or obstruction in a specific clutch apply circuit could be present.
 
You may have to drive the vehicle in order to experience a condition.
 

Trouble Code: P0730



Incorrect Gear Ratio

Possible Causes:



A false or incorrect AT OSS or AT ISS signal can set DTC P0730.
 
DTC P0894 detects an incorrect gear ratio in fourth gear with the torque converter clutch (TCC) applied.
 
Inspect for any improperly installed aftermarket equipment.
 
Sticking or contamination of shift valves may cause intermittent incorrect gear ratios.
 
Refer to Shift Solenoid Valve State and Gear Ratio .
 
DTC P0730 defaults to an elevated line pressure which may result in partial TCC apply. This may produce an idle surge that could stall the engine.
 

 
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