Sierra, Silverado 2006-2007

5.3L V8 VIN J Auto 11

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Trouble Code: P2149



Injector Positive Voltage Control Circuit Group 2

Trouble Code: P2152



Injector Positive Voltage Control Circuit Group 3

Trouble Code: P2155



Injector Positive Voltage Control Circuit Group 4

Trouble Code: P2199



Intake Air Temperature (IAT) Sensor 1-2 Correlation

Possible Causes:



1. A slight to moderate resistance in either signal or low reference circuit, can widen the spread between the two IAT sensors, and cause this DTC to set.
 
2. An IAT sensor that is skewed lower at various ambient temperatures, due to more resistance than is normal, can widen the spread between the two sensors and cause this DTC to set. Measure and record the resistance of the IAT sensor 1 and IAT sensor 2 at various ambient temperatures, and then compare those measurements to the Temperature vs. Resistance Table. Refer to Temperature Versus Resistance .
 
3. Inspect IAT sensor 1 and sensor 2 terminals, for corrosion or a poor connection.
 
4. If the ignition has been OFF for more than 10 hours, then determine which IAT sensor is skewed by comparing ECT, IAT sensor 1, and IAT sensor 2 parameters with a scan tool.
 

Trouble Code: P2228



Barometric Pressure (BARO) Sensor Circuit Low Voltage

Trouble Code: P2229



Barometric Pressure (BARO) Sensor Circuit High Voltage

Trouble Code: P2510



Engine Control Module Relay Circuit

Trouble Code: P2534



Ignition 1 Switch Circuit Low Voltage

Possible Causes:



If all circuit tests are OK, ensure the transmission pass through connector and harness terminals are clean and not damaged, and the charging system is functioning correctly.
 
Verify there is a good connection at the body control module (BCM) especially if DTC P0700 is also set with this code.
 

Trouble Code: P2544



Transmission Torque Request Circuit

Possible Causes:



This diagnostic trouble code may set due to low system voltage. Ensure that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test . Verify charging system is operating correctly. Refer to Charging System Test . Verify there is no parasitic drain on the battery. Refer to Battery Electrical Drain/Parasitic Load Test .
 

Trouble Code: P2563



Turbocharger Boost Control Position Sensor Performance

Possible Causes:



Verify that any electrical aftermarket devices are properly connected and grounded. Refer to Checking Aftermarket Accessories .
 
A MAP sensor that is skewed or bias may cause this DTC to set.
 
A restricted oil supply feed to the turbocharger may cause this DTC to set. Refer to Turbocharger Lack of Oil Supply .
 

Trouble Code: P2564



Turbocharger Boost Control Position Sensor Circuit Low Voltage

Possible Causes:



Verify that any electrical aftermarket devices are properly connected and grounded. Refer to Checking Aftermarket Accessories .
 

Trouble Code: P2565



Turbocharger Boost Control Position Sensor Circuit High Voltage

Possible Causes:



Verify that any electrical aftermarket devices are properly connected and grounded. Refer to Checking Aftermarket Accessories .
 

Trouble Code: P2610



Control Module Ignition Off Timer Performance

Trouble Code: P2636



Fuel Transfer Pump Flow Insufficient

Trouble Code: P2670



Actuator Supply Voltage 2 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: P2671



Actuator Supply Voltage 2 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: P268A



Fuel Injector Calibration Data Not Programmed

Trouble Code: P2714



Clutch Pressure Control (PC) Solenoid 4 - Stuck Off

Possible Causes:



When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions.
 

Trouble Code: P2715



Clutch Pressure Control (PC) Solenoid 4 - Stuck On

Possible Causes:



When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions.
 

Trouble Code: P2719



Clutch Pressure Control (PC) Solenoid 4 System Performance

Possible Causes:



When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in second gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P2720



Clutch Pressure Control (PC) Solenoid 4 Control Circuit Low Voltage

Possible Causes:



When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in second gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P2721



Clutch Pressure Control (PC) Solenoid 4 Control Circuit High Voltage

Possible Causes:



When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in second gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P2723



Pressure Control Solenoid 1 (PCS1) Controlled Clutch Stuck Off

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.This DTC indicates the on-coming clutch being controlled by PCS1 is not applied or applied too slowly. This could indicate a leak or obstruction in a specific clutch apply circuit. Observe scan tool failure record data for previous or current range information when the DTC was set, in order to determine the specific shift when the DTC was set. Refer to the Solenoid and Clutch Chart to determine which clutch circuit is suspect.Important: Clutch failure due to installation of an engine power upgrade is not covered under the manufacturers warranty. Inspect for the presence of an add-on engine power package. When engine horsepower or torque is increased over factory rating, a shift flare condition may occur.
 

Trouble Code: P2724



Pressure Control Solenoid 1 (PCS1) Controlled Clutch Stuck On

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.This DTC indicates the off-going clutch being controlled by PCS1 is not releasing or is slow to release. This could indicate a leak or obstruction in a specific clutch apply circuit. Observe scan tool failure record data for previous or current range information when the DTC was set, in order to determine the specific shift when the DTC was set. Refer to the Solenoid and Clutch Chart to determine which clutch circuit is suspect.Important: Clutch failure due to installation of an engine power upgrade is not covered under the manufacturers warranty. Inspect for the presence of an add-on engine power package. When engine horsepower or torque is increased over factory rating, a shift flare condition may occur.
 

Trouble Code: P2727



Pressure Control Solenoid 1 (PCS1) Control Circuit Open (A)

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: P2728



Clutch Pressure Control (PC) Solenoid 5 System Performance

Possible Causes:



When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in second gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P2729



Pressure Control Solenoid 1 (PCS1) Control Circuit Low (A)

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: P2730



Pressure Control Solenoid 1 (PCS1) Control Circuit High (A)

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: P2761



Torque Converter Clutch (TCC) Pressure Control (PC) Solenoid Control Circuit

Trouble Code: P2762



Torque Converter Clutch (TCC) Pressure Control Solenoid System Performance

Possible Causes:



When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in 2nd gear long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
 

Trouble Code: P2763



Torque Converter Clutch (TCC) Pressure Control Solenoid (PCS) Control Circuit 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: P2764



Torque Converter Clutch (TCC) Pressure Control Solenoid (PCS) Control Circuit 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: P2771



Four Wheel Drive (4WD) Low Switch Circuit

Possible Causes:



Verify that the input speed sensor (ISS) and the output speed sensor (OSS) are functioning properly.
 
In 3rd gear at approximately 64 km/h (40 mph), command TCC ON. If functioning properly the OSS will track ISS and the engine RPM.
 
If not, refer to DTC P0716 for the ISS and DTC P0723 for the OSS.
 

Trouble Code: P2796



Auxiliary Transmission Fluid Pump Relay Control Circuit

Possible Causes:



The Auxiliary Transmission Fluid Pump Relay can be controlled using a Scan Tool. This feature is located in the HCM Output Controls on the scan tool.
 
For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P2797



Auxiliary Transmission Fluid Pump Performance

Possible Causes:



The Auxiliary Transmission Fluid Pump Relay can be controlled using a Scan Tool. This feature is located in the HPCM Output Controls on the scan tool.
 
Inspect for restricted Auxiliary Transmission Fluid Pump pickup filter.
 
Inspect for leaking at the Auxiliary Transmission Fluid Pump mounting surface.
 
Inspect charging system and battery voltage for correct operation.
 
Ensure all Engine Idle Off enabling criteria have been met to ensure auxiliary transmission fluid pump operation is possible.
 
For an intermittent condition, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P2A01



HO2S Performance Bank 1 Sensor 2

Trouble Code: P2A04



HO2S Performance Bank 2 Sensor 2

Trouble Code: U0001



High Speed CAN Communication Bus

Possible Causes:



This DTC cannot be retrieved with a current status. Diagnosis of current DTC is accomplished via the symptom, Scan Tool Does Not Communicate with GMLAN Device. Refer to Scan Tool Does Not Communicate with High Speed GMLAN Device .
 
An intermittent condition is likely to be caused by a short on the GMLAN serial data circuits. Use the Scan Tool Does Not Communicate with GMLAN Device procedure in order to isolate an intermittent condition. Refer to Scan Tool Does Not Communicate with High Speed GMLAN Device .
 

Trouble Code: U0073



High Speed CAN Communication Bus

Trouble Code: U0100



Lost Communication With Engine Control Module (ECM)

Possible Causes:



A poor connection at the inoperative module may cause this code to set.
 
An improperly powered module may cause this code to set.
 

 
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