HHR 2006-2008

2.2L L4 VIN D Std 10

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Trouble Code: P2304



Ignition Coil 2 Control Circuit High Voltage

Possible Causes:



Ignition Coil circuit for a short to ground or an open/high resistance
 
Inition Coil circuit for a short to voltage
 
Ignition coil has failed
 
ECM has failed
 

Trouble Code: P2306



Ignition Coil 3 Control Circuit Low Voltage

Possible Causes:



Ignition Coil circuit for a short to ground or an open/high resistance
 
Inition Coil circuit for a short to voltage
 
Ignition coil has failed
 
ECM has failed
 

Trouble Code: P2307



Ignition Coil 3 Control Circuit High Voltage

Possible Causes:



Ignition Coil circuit for a short to ground or an open/high resistance
 
Inition Coil circuit for a short to voltage
 
Ignition coil has failed
 
ECM has failed
 

Trouble Code: P2309



Ignition Coil 4 Control Circuit Low Voltage

Possible Causes:



Ignition Coil circuit for a short to ground or an open/high resistance
 
Inition Coil circuit for a short to voltage
 
Ignition coil has failed
 
ECM has failed
 

Trouble Code: P2310



Ignition Coil 4 Control Circuit High Voltage

Possible Causes:



Ignition Coil circuit for a short to ground or an open/high resistance
 
Inition Coil circuit for a short to voltage
 
Ignition coil has failed
 
ECM has failed
 

Trouble Code: P2312



Ignition Coil 5 Control Circuit Low Voltage

Possible Causes:



Ignition Coil circuit for a short to ground or an open/high resistance
 
Inition Coil circuit for a short to voltage
 
Ignition coil has failed
 
ECM has failed
 

Trouble Code: P2313



Ignition Coil 5 Control Circuit High Voltage

Possible Causes:



Ignition Coil circuit for a short to ground or an open/high resistance
 
Inition Coil circuit for a short to voltage
 
Ignition coil has failed
 
ECM has failed
 

Trouble Code: P2315



Ignition Coil 6 Control Circuit Low Voltage

Possible Causes:



Ignition Coil circuit for a short to ground or an open/high resistance
 
Inition Coil circuit for a short to voltage
 
Ignition coil has failed
 
ECM has failed
 

Trouble Code: P2316



Ignition Coil 6 Control Circuit High Voltage

Possible Causes:



Ignition Coil circuit for a short to ground or an open/high resistance
 
Inition Coil circuit for a short to voltage
 
Ignition coil has failed
 
ECM has failed
 

Trouble Code: P2534



Ignition 1 Switch Circuit Low Voltage

Trouble Code: P2535



Ignition 1 Switch Circuit High Voltage

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: P2544



Transmission Torque Request Circuit

Possible Causes:



If DTC P0604 is set, replace the ECM.
 
If DTC P0604 is not set, replace the TCM.
 

Trouble Code: P2610



Control Module Ignition Off Timer Performance

Trouble Code: P2610



Control Module Ignition OFF Timer Performance

Possible Causes:



Voltage and ground inputs to the ECM
 
If DTC P0602 is set, attempt to program the ECM before replacing the ECM. If DTC P0602 resets, replace the ECM.
 

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

Trouble Code: P2A00



HO2S Circuit Closed Loop (CL) Performance Sensor 1

Trouble Code: P2A00



HO2S Performance Sensor 1

Possible Causes:



HO2S signal circuit open/high resistance
 
HO2S signal circuit short to voltage
 
HO2S signal circuit open/high resistance
 
HO2S is damaged
 
ECM has failed
 

Trouble Code: P2A01



HO2S Circuit Sensor 2

Trouble Code: P2A01



HO2S Performance Sensor 2

Possible Causes:



Collapsed air intake duct
 
Restricted air filter element
 
Excessive fuel in the crankcase
 
Fuel contamination
 
Rich injectors
 
Engine mechanical conditions
 
Restricted exhaust system
 
Faulty HO2S
 
ECM has failed
 

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: U0020



Low Speed CAN Communication Bus Performance

Possible Causes:



Control modules the vehicle is equipped with
 
Control modules B+, ignition, ground, communication enable and serial data circuit terminals
 
Control module locations on the low and high speed GMLAN serial data circuits
 

Trouble Code: U0073



Controller Area Network (CAN) Bus Communication

Possible Causes:



This DTC cannot be retrieved with a current status. Diagnosis of a current DTC is accomplished via the symptom, Scan Tool Does Not Communicate with High and/or Low Speed GMLAN Device. Refer to Control Module References for the correct procedure for the specific module(s) and the busses they use to communicate.
 
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 High and/or Low Speed GMLAN Device procedure in order to isolate an intermittent condition. Refer to Control Module References for the correct procedure for the specific modules.
 

Trouble Code: U0073



Control Module Communication Bus Off

Possible Causes:



Control modules the vehicle is equipped with
 
Control module locations on the low speed GMLAN serial data circuit
 
Each control module's low speed GMLAN serial data circuit terminals
 
Control modules the vehicle is equipped with
 
High speed GMLAN serial data circuit terminating resistors
 
Control module locations on the high speed GMLAN serial data circuits
 
Each control module's high speed GMLAN serial data circuit terminals
 

Trouble Code: U0100



Lost Communication With Engine Control Module (ECM) or lost communication with Powertrain Control Module (PCM)

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.
 

Trouble Code: U0101



Lost Communication With Transmission Control Module (TCM)

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.
 

Trouble Code: U0121



Lost Communication With Electronic Brake Control Module (EBCM)

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.
 

Trouble Code: U0126



Lost communication with Power Steering Control Module (PSCM)

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.
 

Trouble Code: U0140



Lost Communication With Body Control Module (BCM)

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.
 

Trouble Code: U0299



N/A

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.
 

Trouble Code: U1000



Class 2 Communication Malfunction

Possible Causes:



Class 2 circuit is open, shorted to ground or shorted to power
 
ECM ignition power circuit(s) has a high resistance condition
 
ECM main ground circuit(s) has a high resistance condition
 
SDM (module) could be shorted pulling the voltage low
 

Trouble Code: U1016



No Communication With Powertrain Control Module

Possible Causes:



ECM Class 2 circuit is open, shorted to ground or to B+
 
ECM ignition power circuit(s) has a high resistance condition
 
ECM main ground circuit(s) has a high resistance condition
 
ECM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1026



Loss of ATC Class 2 Communication

Possible Causes:



Check for a loose connection at the ATC module
 
Test the main power and ground circuits to the ATC module
 
Check the Class 2 serial data circuit to the ATC module
 
ATC module may have failed
 

Trouble Code: U1041



Loss of Electronic Brake Controller Communication

Possible Causes:



Check for a loose connection at the EBCM (module)
 
Test the main power and ground circuits to the EBCM (module)
 
Check the Class 2 serial data circuit to the EBCM (module)
 
EBCM (module) may have failed
 

Trouble Code: U1064



No Communication With Body Control Module

Possible Causes:



BCM Class 2 circuit is open, shorted to ground or to B+
 
BCM ignition power circuit has a high resistance condition
 
BCM main ground circuit(s) has a high resistance condition
 
BCM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1088



No Communication With SDM (Restraint Module)

Possible Causes:



SDM Class 2 circuit is open, shorted to ground or to B+
 
SDM ignition power circuit has a high resistance condition
 
SDM main ground circuit(s) has a high resistance condition
 
SDM (module) may have failed and is pulling the circuit low
 

Trouble Code: U1092



Loss of VTD (Pass Lock) Communication

Possible Causes:



Check for a loose connection at the VTD module
 
Test the main power and ground circuits to the VTD module
 
Check the Class 2 serial data circuit to the VTD module
 
VTD module may have failed
 

Trouble Code: U1096



No Communication With Instrument Panel Cluster

Possible Causes:



IPC Class 2 circuit is open, shorted to ground or to B+
 
IPC ignition power circuit has a high resistance condition
 
IPC main ground circuit(s) has a high resistance condition
 
IPC (module) may have failed and is pulling the circuit low
 

Trouble Code: U1097



No Communication With Driver Information Center

Possible Causes:



DIC Class 2 circuit is open, shorted to ground or to B+
 
DIC ignition power circuit has a high resistance condition
 
DIC main ground circuit(s) has a high resistance condition
 
DIC (module) may have failed and is pulling the circuit low
 

 
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