Sierra, Silverado 2006-2007

6.6L V8 VIN D Std 4

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Trouble Code: P0678



Cylinder #8 Glow Plug Control Circuit

Possible Causes:



If the battery is connected with the ignition ON, the glow plugs could be damaged without finding any circuit fault.
 

Trouble Code: P0698



5-Volt Reference 3 Circuit Low Voltage

Trouble Code: P0699



5-Volt Reference 3 Circuit High Voltage

Trouble Code: P0700



Transmission Control Module (TCM) Requested MIL Illumination

Trouble Code: P0833



Clutch Pedal Switch 2 Circuit

Trouble Code: P0856



Traction Control Torque Request Circuit

Possible Causes:

C0298 A requested torque signal malfunction is only one possible cause for the PCM to lose the ability to perform traction control. DTC C0298 may set due to engine overheating, throttle actuator control failure, loss of ignition timing control by the PCM, etc. If DTC P0856 has not set, refer to the following in order to identify other possible causes of DTC C0298:



Symptoms - Engine Controls for the 4.3L engine
 
Symptoms - Engine Controls for the 8.1L engine
 
Symptoms - Engine Controls for the 4.8L, 5.3L, and 6.0L engines
 
Symptoms - Engine Controls for the 6.6L (LBZ and LLY) engine
 



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

Trouble Code: P0A01



Starter/Generator Control Module Coolant Temperature Sensor 1 Performance

Trouble Code: P0A02



Starter/Generator Control Module Coolant Temperature Sensor 1 Circuit Low Voltage

Trouble Code: P0A03



Starter/Generator Control Module Coolant Temperature Sensor 1 Circuit High Voltage

Trouble Code: P0A06



Battery Energy Control Module Read Only Memory (ROM)

Possible Causes:



If condition is not present, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0A07



Battery Energy Control Module 5-Volt Reference Circuit

Possible Causes:



If condition is not present, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P0A0A



High Voltage System Interlock Circuit

Possible Causes:



Ensure that all connectors are connected properly.
 

Trouble Code: P0A1D



HCM System Fault

Trouble Code: P0A27



Hybrid Battery Pack Relay Feedback Circuit

Trouble Code: P0A3E



Starter/Generator Control Module Overtemperature

Possible Causes:



If there is a restriction of the air flow through the radiator this DTC may set. Ensure that the vehicle front end has at least 1.5 meters (5 feet) of clearance from obstructions to airflow if vehicle is parked.
 

Trouble Code: P0A7E



Hybrid Battery Pack Overtemperature

Trouble Code: P0A7F



Hybrid Battery Pack Life

Trouble Code: P0A82



Hybrid Battery Pack Cooling Fan Stuck OFF

Trouble Code: P0A83



Hybrid Battery Pack Cooling Fan Stuck ON

Trouble Code: P0A88



14-Volt Power Module Current Sensor Circuit Low Current

Trouble Code: P0A89



14-Volt Power Module Current Sensor Circuit High Current

Trouble Code: P0A8B



14-Volt Power Module System Voltage

Trouble Code: P0A8E



14-Volt Power Module System Voltage High

Trouble Code: P0A9C



Hybrid Battery 1 Temperature Sensor Performance

Trouble Code: P0A9D



Hybrid Battery 1 Temperature Sensor Circuit Low Voltage

Trouble Code: P0A9E



Hybrid Battery 1 Temperature Sensor Circuit High Voltage

Trouble Code: P0ABF



N/A

Trouble Code: P0AC0



N/A

Trouble Code: P0AC6



Hybrid Battery 2 Temperature Sensor Performance

Trouble Code: P0AC7



Hybrid Battery 2 Temperature Sensor Circuit Low Voltage

Trouble Code: P0AC8



Hybrid Battery 2 Temperature Sensor Circuit High Voltage

Trouble Code: P0ACB



Hybrid Battery 3 Temperature Sensor Performance

Trouble Code: P0ACC



Hybrid Battery 3 Temperature Sensor Circuit Low Voltage

Trouble Code: P0ACD



Hybrid Battery 3 Temperature Sensor Circuit High Voltage

Trouble Code: P1121



Throttle Position (TP) Sensor Circuit Intermittent High Voltage

Trouble Code: P1122



Throttle Position (TP) Sensor Circuit Intermittent Low Voltage

Trouble Code: P150C



Transmission Control Module (TCM) Engine Speed Request Circuit

Possible Causes:



Use the DTC Descriptor list to determine the module which is not communicating. If there are multiple non-communicating modules in series on high speed GMLAN, choose the one closest to the data link connector (DLC) for this diagnostic.
 

Trouble Code: P1574



Stoplamp Switch Circuit

Possible Causes:



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

Trouble Code: P160C



Engine Calibration Information Not Programmed - GPCM

Trouble Code: P1626



Theft Deterrent Fuel Enable Signal Lost

Possible Causes:

Important: Do not clear DTCs unless directed by a diagnostic procedure. Clearing DTCs will also clear valuable Freeze Frame and Failure Records data.



Inspect for published service bulletins relating to exhibited symptoms or component operation.
 
Inspect all related wiring and connections including the PCM and BCM connections. These may cause an intermittent malfunction.
 
If the class 2 serial data circuit is shorted to ground or shorted to voltage, then all systems connected to the serial data circuit will not be able to communicate properly. Systems capable of storing loss of communications DTCs, or the DTCs with the letter "U" as a prefix, will have these codes stored in their memory. If a DTC U1192 is stored in the PCM memory along with the P1626, then a fault occurred at some point after the PCM received the correct password. The BCM must also be inspected for intermittent operation due to a loss of power or ground to the module itself. After repairing the cause of DTC 1626, clear all DTCs from the systems capable of storing this DTC and DTC U1192.
 
The VTD Passlock parameters can be monitored in the PCM under engine data 2, display with a scan tool.
 
The scan tool Diagnostic Circuit Check can be used to:

Monitor the class 2 serial data circuit for modules which have been or are communicating.
 
Monitor for loss of communications DTCs with the letter "U" as a prefix: U1001-U1199.
 
Clear loss of communication DTCs. When a Clear Codes command is issued, all codes, Freeze Frame and Failure Records information is cleared.
 

The scan tool Class 2 Message Monitor will show the status of each module on the class 2 circuit. A status of Active indicates that the module is communicating with the scan tool. An Inactive status indicates that the module previously communicated with the scan tool, but is not communicating currently. The inactive status will only appear if the loss of communication occurs while on the Message Monitor screen. If a module is not listed at all, then the missing module never successfully established communications with the scan tool or lost communication while on another screen. Refer to Scan Tool Does Not Communicate with Class 2 Device in Computer/Integrating Systems for the complete class 2 data link to determine if there are any unlisted modules.An intermittent may be caused by any of the following conditions:

A poor connection
 
Rubbed through wire insulation
 
A broken wire inside the insulation
 

Thoroughly inspect any circuitry that is suspected of causing the intermittent complaint. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.If a repair is necessary, refer to Wiring Repairs or Connector Repairs in Wiring Systems.
 

 
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