Malibu, Malibu MAXX 2006-2008

3.6L V6 VIN 7 Auto 6

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Trouble Code: P216D



Injector Positive Voltage Control Circuit (Group 6)

Possible Causes:



High voltage control circuit shorted to voltage
 
High voltage control circuit short to ground or an open/high resistance
 
Low voltage control circuit shorted to voltage
 
Low voltage control circuit short to ground or an open/high resistance
 
Faulty fuel injector
 
ECM has failed.
 

Trouble Code: P2176



Minimum Throttle Position Not Learned

Possible Causes:



Perform the throttle learn procedure
 
Throttle body has failed.
 

Trouble Code: P2177



Fuel Trim System Lean at Cruise or Accel (Bank1)

Possible Causes:



Leaking crankcase ventilation system
 
Fuel system is operating lean
 
Vacuum leaks that only affect one bank of the engine
 
Lean injectors
 
Fuel contamination
 
Engine mechanical conditions
 
High engine oil level condition
 
engine control module grounds for being clean, tight, and in the correct locations
 
Mass Air Flow (MAF) sensor signal that is skewed
 
Air intake system after the MAF sensor for vacuum leaks
 
Missing, restricted, or leaking exhaust components
 
Heated oxygen sensor (HO2S)
 

Trouble Code: P2178



Fuel Trim System Rich at Cruise or Accel (Bank 1)

Possible Causes:



Mass Air Flow (MAF) sensor signal that is skewed
 
Collapsed air intake duct
 
Restricted air filter element
 
Excessive fuel in the crankcase
 
Fuel contamination
 
Engine control module grounds for being clean, tight, and in the correct locations
 
Rich injectors
 
Engine mechanical conditions
 
Restricted exhaust system
 

Trouble Code: P2179



Fuel Trim System Lean at Cruise or Accel (Bank 2)

Possible Causes:



Leaking crankcase ventilation system
 
Fuel system is operating lean
 
Vacuum leaks that only affect one bank of the engine
 
Lean injectors
 
Fuel contamination
 
Engine mechanical conditions
 
High engine oil level condition
 
engine control module grounds for being clean, tight, and in the correct locations
 
Mass Air Flow (MAF) sensor signal that is skewed
 
Air intake system after the MAF sensor for vacuum leaks
 
Missing, restricted, or leaking exhaust components
 
Heated oxygen sensor (HO2S)
 

Trouble Code: P2180



Fuel Trim System Rich at Cruise or Accel Bank 2

Possible Causes:



Mass Air Flow (MAF) sensor signal that is skewed
 
Collapsed air intake duct
 
Restricted air filter element
 
Excessive fuel in the crankcase
 
Fuel contamination
 
Engine control module grounds for being clean, tight, and in the correct locations
 
Rich injectors
 
Engine mechanical conditions
 
Restricted exhaust system
 

Trouble Code: P2187



Fuel Trim System Lean at Idle (Bank 1)

Possible Causes:



Leaking crankcase ventilation system
 
Fuel system is operating lean
 
Vacuum leaks that only affect one bank of the engine
 
Lean injectors
 
Fuel contamination
 
Engine mechanical conditions
 
High engine oil level condition
 
engine control module grounds for being clean, tight, and in the correct locations
 
Mass Air Flow (MAF) sensor signal that is skewed
 
Air intake system after the MAF sensor for vacuum leaks
 
Missing, restricted, or leaking exhaust components
 
Heated oxygen sensor (HO2S)
 

Trouble Code: P2188



Fuel Trim System Rich at Idle Bank 1

Possible Causes:



Mass Air Flow (MAF) sensor signal that is skewed
 
Collapsed air intake duct
 
Restricted air filter element
 
Excessive fuel in the crankcase
 
Fuel contamination
 
Engine control module grounds for being clean, tight, and in the correct locations
 
Rich injectors
 
Engine mechanical conditions
 
Restricted exhaust system
 

Trouble Code: P2189



Fuel Trim System Lean at Idle (Bank 2)

Possible Causes:



Leaking crankcase ventilation system
 
Fuel system is operating lean
 
Vacuum leaks that only affect one bank of the engine
 
Lean injectors
 
Fuel contamination
 
Engine mechanical conditions
 
High engine oil level condition
 
Engine control module grounds for being clean, tight, and in the correct locations
 
Mass Air Flow (MAF) sensor signal that is skewed
 
Air intake system after the MAF sensor for vacuum leaks
 
Missing, restricted, or leaking exhaust components
 
Heated oxygen sensor (HO2S)
 

Trouble Code: P2190



Fuel Trim System Rich at Idle Bank 2

Possible Causes:



Mass Air Flow (MAF) sensor signal that is skewed
 
Collapsed air intake duct
 
Restricted air filter element
 
Excessive fuel in the crankcase
 
Fuel contamination
 
Engine control module grounds for being clean, tight, and in the correct locations
 
Rich injectors
 
Engine mechanical conditions
 
Restricted exhaust system
 

Trouble Code: P2232



HO2S Signal Circuit Shorted to Heater Circuit (Bank 1 Sensor 2)

Possible Causes:



Signal circuit terminal B for a short to the heater control circuit terminal E
 
ECM has failed
 
Faulty HO2S
 

Trouble Code: P2235



HO2S Signal Circuit Shorted to Heater Circuit (Bank 2 Sensor 2)

Possible Causes:



Signal circuit terminal B for a short to the heater control circuit terminal E
 
ECM has failed
 
Faulty HO2S
 

Trouble Code: P2270



HO2S Signal Stuck Lean (Bank 1 Sensor 2)

Possible Causes:



Water intrusion in the HO2S harness connector
 
Signal circuit terminal B for a short to ground
 
Low fuel system pressure
 
Lean fuel injectors
 
Fuel that is contaminated
 
Vacuum hoses for splits, kinks, and proper connection
 
Air intake system after the Mass Air Flow (MAF) sensor for vacuum leaks
 
Exhaust system leaks
 
Contaminated HO2S - Silicon
 
Engine mechanical condition
 
Faulty HO2S
 
ECM has failed
 

Trouble Code: P2271



HO2S Signal Stuck Rich (Bank 1 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: P2272



HO2S Signal Stuck Lean (Bank 2 Sensor 2)

Possible Causes:



Water intrusion in the HO2S harness connector
 
Signal circuit terminal B for a short to ground
 
Low fuel system pressure
 
Lean fuel injectors
 
Fuel that is contaminated
 
Vacuum hoses for splits, kinks, and proper connection
 
Air intake system after the Mass Air Flow (MAF) sensor for vacuum leaks
 
Exhaust system leaks
 
Contaminated HO2S - Silicon
 
Engine mechanical condition
 
Faulty HO2S
 
ECM has failed
 

Trouble Code: P2273



HO2S Signal Stuck Rich (Bank 1 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: P2300



Ignition Coil 1 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: P2301



Ignition Coil 1 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: P2303



Ignition Coil 2 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: 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: 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: 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



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: 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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