Sierra, Silverado 2006-2007

4.3L V6 VIN X Auto 11

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Trouble Code: P2066



Fuel Level Sensor 2 Performance

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, including those for RPM, for engine load, for vehicle speed, for temperature, and for others. This will isolate when the DTC failed. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
 

Trouble Code: P2066



Fuel Level Sensor 2 Performance

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, including those for RPM, for engine load, for vehicle speed, for temperature, and for others. This will isolate when the DTC failed. Refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P2067



Fuel Level Sensor 2 Circuit Low Voltage

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, including those for RPM, for engine load, for vehicle speed, for temperature, and for others. This will isolate when the DTC failed. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
 

Trouble Code: P2067



Fuel Level Sensor 2 Circuit Low Voltage

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, including those for RPM, for engine load, for vehicle speed, for temperature, and for others. This will isolate when the DTC failed. Refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P2068



Fuel Level Sensor 2 Circuit High Voltage

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, including those for RPM, for engine load, for vehicle speed, for temperature, and for others. This will isolate when the DTC failed. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
 

Trouble Code: P2068



Fuel Level Sensor 2 Circuit High Voltage

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, including those for RPM, for engine load, for vehicle speed, for temperature, and for others. This will isolate when the DTC failed. Refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P2122



Accelerator Pedal Position (APP) Sensor 1 Circuit Low Voltage

Trouble Code: P2123



Accelerator Pedal Position (APP) Sensor 1 Circuit High Voltage

Trouble Code: P2127



Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

Trouble Code: P2128



Accelerator Pedal Position (APP) Sensor 2 Circuit High Voltage

Trouble Code: P2146



Injector Positive Voltage Control Circuit Group 1

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: 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.
 

 
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