CTS 2006-2007, CTS-V 2005-2007, DTS 2006-2007

4.6L V8 VIN Y Auto 6

Print

Trouble Code: P0976



2-3 Shift Solenoid (SS) Control Circuit Low Voltage

Trouble Code: P0977



2-3 Shift Solenoid (SS) Control Circuit High Voltage

Trouble Code: P1101



Intake Air Flow System Performance

Possible Causes:



A steady or intermittent high resistance of 25 ohms or more on the ignition 1 voltage circuit will cause the MAF sensor values to be skewed high by up to 30 g/s. Use the scan tool to compare the MAF Sensor parameter to a known good vehicle under various operating conditions.
 
A skewed MAP sensor will also cause the first and second intake manifold models to disagree with the actual MAP sensor measurements. Use the scan tool to compare the MAP Sensor parameter to a known good vehicle under various operating conditions.
 
A skewed or stuck engine coolant temperature (ECT) or IAT sensor will cause the calculated models to be inaccurate and may cause this DTC to run when it should not. Refer to Temperature Versus Resistance .
 

Trouble Code: P1133



HO2S Insufficient Switching Bank 1 Sensor 1

Trouble Code: P1153



HO2S Insufficient Switching Bank 2 Sensor 1

Trouble Code: P1258



Engine Coolant Overtemperature-Protection Mode Active

Trouble Code: P1258



Engine Coolant Overtemperature - Protection Mode Active

Trouble Code: P1380



Misfire Detected Rough-Road Data Not Available

Trouble Code: P1381



Misfire Detected No Communication With Brake Control Module

Trouble Code: P1400



Cold Start Emission Reduction Control System

Possible Causes:



Any loading of the engine that lowers engine RPM, such as partial application of the clutch, A/C cycling, etc. during the first 120 seconds of the engine run time may set this DTC.
 

Trouble Code: P1404



Exhaust Gas Recirculation (EGR) Closed Position Performance

Possible Causes:



Inspect for excessive deposits on the EGR valve pintle or seat. Remove the EGR valve and check for deposits that may interfere with the EGR valve pintle extending completely or cause the pintle to stick.
 
If the problem is intermittent, refer to Testing for Intermittent Conditions and Poor Connections .
 

Trouble Code: P1516



Throttle Actuator Control (TAC) Module Throttle Actuator Position Performance

Trouble Code: P1553



Adaptive Cruise Control Signal Circuit

Possible Causes:



An FLS radar out of alignment condition may be as a result of tampering with the DSCC module mounting structures/brackets or the adjuster settings. An out of alignment condition may also be a result of damage to the front section vehicle or the DSCC module.
 

Trouble Code: P1629



Theft Deterrent Fuel Enable Signal Not Received

Possible Causes:



DTC P1629 is an indicator that the challenge response was not received within the required 2 second window. This does not necessarily indicate a fault is present with the TDM or ECM. Factors such as a long engine crank, a delay in the serial data communication, or B-codes set in the TDM will cause DTC P1629 to set. This DTC should not be used as a fault indicator, but rather as a symptom to assist in the diagnosis of these other systems.
 

Trouble Code: P1629



Theft Deterrent Fuel Enable Signal Not Received

Possible Causes:



DTC P1629 is an indicator that the challenge/response was not received within the required time. This does not necessarily indicate a fault is present with the TDM or ECM. Factors such as a long engine crank, a delay in the serial data communication, or B-codes set in the TDM will cause DTC P1629 to set. This DTC should not be used as a fault indicator, but rather as a symptom to assist in the diagnosis of these other systems.
 

Trouble Code: P1631



Theft Deterrent Fuel Enable Signal Not Correct

Trouble Code: P1632



Theft Deterrent Fuel Disable Signal Received

Possible Causes:



The pre-release password sent to the ECM by the TDM is reliant on the communications between the transponder located in the vehicle key and the TDM. Failure to establish communications or an interruption in the communications between the vehicle key and the TDM will cause the fuel disable message to be sent and the setting of DTC P1632. In this instance, DTC B3055 or B3060 will be set in the TDM. To properly diagnose DTC P1632, DTC B3055 or B3060 must be diagnosed and corrected first.
 

Trouble Code: P1632



Theft Deterrent Fuel Disable Signal Received

Possible Causes:



The prerelease password sent to the ECM by the TDM is reliant on the communications between the transponder located in the vehicle key and the TDM. Failure to establish communications or an interruption in the communications between the vehicle key and the TDM will cause the fuel disable message to be sent and the setting of DTC B1632. DTC B3055 or B3060 will be set in the TDM. To properly diagnose DTC P1632, DTC B3055 or B3060 must be diagnosed and corrected first.
 

Trouble Code: P1668



Generator L-Terminal Control Circuit

Trouble Code: P1682



Ignition 1 Switch Circuit 2

Possible Causes:



This test procedure requires that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test .
 

Trouble Code: P1682



Ignition 1 Switch Circuit 2

Possible Causes:

This test procedure requires that the vehicle battery has passed a load test and is completely charged. Refer to Battery Inspection/Test . Schematic Reference



Engine Controls Schematics
 
Power Distribution Schematics
 



Engine Controls Connector End Views
 
Engine Control Module Connector End Views
 



Circuit Testing
 
Connector Repairs
 
Testing for Intermittent Conditions and Poor Connections
 
Wiring Repairs
 
Probing Electrical Connectors
 
Electrical Center Identification Views
 

Trouble Code: P1811



Maximum Adapt and Long Shift

Possible Causes:



Ask the customer about overloading the vehicle, exceeding the trailer-towing limit, or towing in Overdrive.
 
Ensure that the TCM has the latest calibration update.
 

Trouble Code: P1820



Internal Mode Switch A Circuit Low Voltage

Trouble Code: P1822



Internal Mode Switch B Circuit High Voltage

Trouble Code: P1823



Internal Mode Switch P Circuit Low Voltage

Trouble Code: P1825



Internal Mode Switch - Invalid Range

Possible Causes:



Refer to Transmission Internal Mode Switch Logic .
 

Trouble Code: P1826



Internal Mode Switch C Circuit High Voltage

Trouble Code: P1915



Internal Mode Switch Does Not Indicate Park/Neutral (P/N) During Start

Trouble Code: P2101



Throttle Actuator Position Performance

Trouble Code: P2119



Throttle Closed Position Performance

Trouble Code: P2120



Accelerator Pedal Position (APP) Sensor 1 Circuit

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: P2125



Accelerator Pedal Position (APP) Sensor 2 Circuit

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: P2135



Throttle Position (TP) Sensor 1-2 Correlation

Trouble Code: P2138



Accelerator Pedal Position (APP) Sensor 1-2 Correlation

Trouble Code: P2176



Minimum Throttle Position Not Learned

Trouble Code: P2430



Secondary Air Injection (AIR) System Pressure Sensor Stuck in Range

 
label.common.footer.alt.autozoneLogo