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

4.6L V8 VIN 9 Auto 7

Print

Trouble Code: P2430



Secondary Air Injection (AIR) System Pressure Sensor Circuit

Trouble Code: P2431



Secondary Air Injection (AIR) System Pressure Sensor Performance

Trouble Code: P2431



Secondary Air Injection System Pressure Sensor A Circuit Range/Performance

Trouble Code: P2432



Secondary Air Injection (AIR) System Pressure Sensor Circuit Low Voltage

Trouble Code: P2432



Secondary Air Injection System Pressure Sensor A Circuit Low

Trouble Code: P2433



Secondary Air Injection (AIR) System Pressure Sensor Circuit High Voltage

Trouble Code: P2433



Air Injection System Pressure Sensor A Circuit High

Trouble Code: P2440



Secondary Air Injection (AIR) System Shut-Off Valve Stuck Open

Trouble Code: P2444



Secondary Air Injection (AIR) System Pump Stuck On

Trouble Code: P2534



Ignition 1 Switch Circuit Low Voltage

Trouble Code: P2544



Transmission Torque Request Circuit

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: P2610



Control Module Ignition Off Timer Performance

Trouble Code: P2763



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

Trouble Code: P2764



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

Possible Causes:



Potentially DTC P0742 can false fail and may have been set due to another DTC.
 

Trouble Code: P2A00



HO2S Performance Bank 1 Sensor 1

Trouble Code: P2A01



HO2S Performance Bank 1 Sensor 2

Trouble Code: P2A03



HO2S Performance Bank 2 Sensor 1

Trouble Code: P2A04



HO2S Performance Bank 2 Sensor 2

Trouble Code: U0073



High Speed Communication Bus

Possible Causes:



An intermittent condition is likely to be caused by a short on the high speed GMLAN serial data circuits.
 
This DTC cannot be retrieved with a current status. Diagnosis is accomplished using the symptom Scan Tool Does Not Communicate with High Speed GMLAN Device .
 
Refer to Data Link References for the specific modules using high speed GMLAN serial data.
 

Trouble Code: U0100



Lost Communication With Engine/Powertrain Control Module (ECM/PCM)

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0101



Lost Communication With Transmission Control Module (TCM)

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0104



Lost Communication With Cruise Control Module

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0121



Lost Communication With Electronic Brake Control Module (EBCM)

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0122



Lost Communication With Vehicle Dynamics Control Module

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0132



Lost Communication With Ride Level Control Module

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0140



Lost Communication With Body Control Module (BCM)

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0151



Lost Communication With Restraints Control Module

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0151



Lost Communication With Sensing and Diagnostic Module (SDM)

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0155



Lost Communication With Instrument Panel Cluster (IPC) Control Module

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0159



Lost Communication With Parking Assist Control Module A

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0164



Lost Communication With HVAC Control Module

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0168



Lost Communication With Vehicle Theft Deterrent (VTD) Control Module

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0170



Lost Communication With Passenger Presence System (PPS)

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0184



Lost Communication With Radio

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0186



Lost Communication With Audio Amplifier

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0194



Lost Communication With Digital Radio Receiver (DRR)

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0198



Lost Communication With Communication Interface Module (OnStar®)

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0199



Lost Communication With Door control Module A

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0200



Lost Communication With Door control Module B

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

Trouble Code: U0209



Lost Communication With Heated Seat Module (HSM)

Possible Causes:



Use the DTC Descriptor list above to determine the module which is not communicating.
 
If there are multiple non-communicating modules choose the one closest to the data link connector (DLC).
 
Use Data Link References to determine if the module uses high or low speed GMLAN serial data communications
 
Some modules may not have internal protection for specific voltage outputs and may open a battery positive voltage or ignition voltage source fuse. If a voltage input fuse is open and no short is found in that circuit, ensure that no module output voltage circuit is shorted to ground before replacing the module.
 
This diagnostic can be used for any module that should communicate with high or low speed GMLAN serial data providing the vehicle is equipped with the option that uses that module.
 

 
label.common.footer.alt.autozoneLogo