Honda Cars 2007-2008

3.5L V6 VIN - Std 6

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Trouble Code: P2279



Intake Air System Leak

Possible Causes:



Vacuum leaks at the PCV valve, the PCV hose, the purge (PCS) line, the throttle body, the intake manifold, and the brake booster hose
 
Incorrect camshaft timing
 

Trouble Code: P2413



Exhaust Gas Recirculation (EGR) System Malfunction

Possible Causes:



Clogged intake manifold EGR port or EGR valve
 
Poor connections or loose terminals at the EGR valve and the PCM
 
"Open" in the wire between the EGR valve and ground
 
"Open" or "Short" circuit between the PCM and the EGR valve
 
Faulty EGR valve
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P2422



EVAP Canister Vent Shut Valve Close Malfunction

Possible Causes:



Poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM
 
Blockage in the EVAP canister, canister filter, vent hoses, and drain joint,
 
Blockage in the FTP sensor air tube or vent
 
Faulty FTP sensor
 
Faulty EVAP canister vent shut valve
 

Trouble Code: P2610



ECM/PCM Ignition Off Internal Timer Malfunction

Possible Causes:



ECM/PCM needs to be updated with the latest software
 
Faulty ECM/PCM
 

Trouble Code: P2627



Rear Air/Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) LABEL Circuit Low Voltage

Possible Causes:



Poor connections or loose terminals at the A/F sensor (Sensor 1) and the PCM
 
"Short" between the A/F sensor relay and each connector
 
Faulty A/F sensor (Sensor 1)
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P2628



Rear Air/Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) LABEL Circuit High Voltage

Possible Causes:



Poor connections or loose terminals at the A/F sensor (Sensor 1) and the PCM
 
"Open" between the A/F sensor relay and each connector
 
"Open" ground circuit
 
Faulty A/F sensor (Sensor 1)
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P2630



Front Air/Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) LABEL Circuit Low Voltage

Possible Causes:



Poor connections or loose terminals at the A/F sensor (Sensor 1) and the PCM
 
"Short" between the A/F sensor relay and each connector
 
Faulty A/F sensor (Sensor 1)
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P2631



Front Air/Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) LABEL Circuit High Voltage

Possible Causes:



Poor connections or loose terminals at the A/F sensor (Sensor 1) and the PCM
 
"Open" between the A/F sensor relay and each connector
 
"Open" ground circuit
 
Faulty A/F sensor (Sensor 1)
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P2646



Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Circuit Low Voltage

Possible Causes:



Low engine oil or faulty oil pressure
 
Poor connections or loose terminals at the rocker arm oil pressure switch, the rocker arm oil control solenoid, and the PCM
 
"Short" circuit between the PCM and the rocker arm oil pressure switch
 
Faulty rocker arm oil pressure switch
 
Faulty rocker arm oil control solenoid
 
Faulty rocker arm
 

Trouble Code: P2647



Rocker Arm Oil Pressure Switch (VTEC Oil Pressure Switch) Circuit High Voltage

Possible Causes:



Low oil level
 
Low oil pressure
 
"Open" in the wire between the rocker arm oil pressure switch and ground
 
Poor connections or loose terminals at the rocker arm oil pressure switch, the rocker arm oil control solenoid, and the PCM
 
"Open" circuit between the PCM and the rocker arm oil pressure switch
 
Faulty rocker arm oil pressure switch
 
Faulty rocker arm oil control solenoid assembly
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P2648



Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit Low Voltage

Possible Causes:



Poor connections or loose terminals at the rocker arm oil control solenoid and the PCM
 
"Short" circuit between the PCM and the rocker arm oil control solenoid
 
Faulty rocker arm oil control solenoid
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P2649



Rocker Arm Oil Control Solenoid (VTEC Solenoid Valve) Circuit High Voltage

Possible Causes:



Poor connections or loose terminals at the rocker arm oil control solenoid and the PCM
 
"Open" circuit between the PCM and the rocker arm oil control solenoid
 
Faulty rocker arm oil control solenoid
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P2653



Rocker Arm Oil Control Solenoid B (Bank 1) Circuit Low Voltage

Possible Causes:



Poor connections or loose terminals at rocker arm oil control solenoid B (Bank 1) and the PCM
 
"Short" circuit between the PCM and rocker arm oil control solenoid B (Bank 1)
 
Faulty rear rocker arm oil control valve
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P2654



Rocker Arm Oil Control Solenoid B (Bank 1) Circuit High Voltage

Possible Causes:



Poor connections or loose terminals at rocker arm oil control solenoid B (Bank 1)and the PCM
 
"Open" circuit between the rocker arm oil control solenoid B and ground
 
"Open" circuit between the PCM and the rocker arm oil control solenoid B
 
Faulty rocker arm oil control valve
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P2658



Rocker Arm Oil Control Solenoid A (Bank 2) Circuit Low Voltage

Possible Causes:



Poor connections or loose terminals at rocker arm oil control solenoid A (Bank 2) and the PCM
 
"Short" circuit between the PCM and rocker arm oil control solenoid A (Bank 2)
 
Faulty front rocker arm oil control valve
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P2659



Rocker Arm Oil Control Solenoid A (Bank 2) Circuit High Voltage

Possible Causes:



Poor connections or loose terminals at rocker arm oil control solenoid A (Bank 2) and the PCM
 
"Open" circuit between the rocker arm oil control solenoid A (Bank 2) and ground
 
"Open" circuit between the PCM and the rocker arm oil control solenoid A
 
Faulty rocker arm oil control valve
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P2A00



Rear Air/Fuel Ratio (A/F) Sensor (Bank 1, Sensor 1) Circuit Range/Performance Problem

Possible Causes:



Poor connections or loose terminals at the A/F sensor (Sensor 1) and the PCM
 
Faulty A/F sensor (Sensor 1)
 

Trouble Code: P2A03



Front Air/Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Circuit Range/Performance Problem

Possible Causes:



Poor connections or loose terminals at the A/F sensor (Sensor 1) and the PCM
 
Faulty A/F sensor (Sensor 1)
 

Trouble Code: P3400



Valve Pulse System (VPS) Stuck Off (Bank 1)

Possible Causes:



Poor connections or loose terminals at rocker arm oil control solenoid A (Bank 1), rocker arm oil control solenoid B (Bank 1), the rear rocker arm oil pressure switch, and the PCM
 
Low or diluted engine oil
 
Clogged oil passage of the rear bank cylinder pause system
 
"Short" circuit between the PCM and the rear rocker arm oil pressure switch
 
Faulty rear rocker arm oil pressure switch
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P3497



Valve Pause System (VPS) Stuck Off (Bank 2)

Possible Causes:



Poor connections or loose terminals at rocker arm oil control solenoid A (Bank 1), rocker arm oil control solenoid B (Bank 1), the rear rocker arm oil pressure switch, and the PCM
 
Low or diluted engine oil
 
Clogged oil passage of the rear bank cylinder pause system
 
"Short" circuit between the PCM and the rear rocker arm oil pressure switch
 
Faulty rear rocker arm oil pressure switch
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: SRS 11-11



Short to Another Airbag Inflator in the Driver's Airbag First Inflator (4-door)

Possible Causes:



Short to another wire in the dashboard wire harness; replace the dashboard wire harness, then clear the DTC
 
SRS unit or poor connection at SRS unit connector
 
Faulty driver's airbag first inflator
 
Dashboard wire harness
 
Wire in the cable reel
 

Trouble Code: U0029



F-CAN A Malfunction (BUS-OFF (PCM))

Possible Causes:



Check battery and charging system condition
 
Loose or poor connections, or worn/shorted wires
 
"Short" in the F-CAN wires
 
Faulty gauge control module
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: U0100



Gauge Control Module Lost Communication With ECM/PCM

Possible Causes:



Faulty battery or charging system
 
Perform the gauge control module input test
 
Loose or poor connections at the gauge control module and the ECM/PCM
 
Check for faulty inputs
 
Gauge control module is faulty
 
Faulty ECM/PCM
 

Trouble Code: U0122



Lost Communication with VSA Modulator-Control Unit

Possible Causes:



Poor connections or loose terminals at the gauge control module, the VSA modulator-control unit, and the PCM
 
"Open circuit between the PCM and the VSA modulator-control
 
Perform DLC circuit troubleshooting
 
Faulty VSA modulator-control unit
 

Trouble Code: U0122



F-CAN A Malfunction (Powertrain Control Module (PCM)-VSA Modulator-Control Unit) (PGM-FI System)

Possible Causes:



Poor connections or loose terminals at the VSA modulator-control unit and the PCM
 
"Open" circuit between the PCM and the VSA modulator-control unit
 
VSA modulator-control unit needs to be updated with the latest software
 
Faulty VSA modulator-control unit
 

Trouble Code: U0127



Gauge Control Module Lost Communication With the TPMS Control Unit (TPMS message)

Possible Causes:



Poor connections or loose terminals between gauge control module and TPMS control unit
 
"Open" circuit between gauge control module and TPMS control unit
 
Faulty TPMS control unit
 
Faulty gauge control module
 

Trouble Code: U0151



Gauge Control Module Lost Communication With SRS Unit

Possible Causes:



Loose or poor connections between the gauge control module, and the SRS unit.
 
"Open" circuit between the gauge control module, and the SRS unit
 
Faulty SRS unit
 
Faulty gauge control module
 

Trouble Code: U0155



Climate Control Unit Lost Communication with Gauge Control Module

Possible Causes:



Loose wires or poor connections on the B-CAN lines between the gauge control module and the climate control unit
 
Perform the gauge control module input test
 
"Open" in the wire(s) between the climate control unit and the gauge control module
 
Faulty climate control unit
 

Trouble Code: U0155



Immobilizer-Keyless Control Unit Lost Communication With Gauge Control Module

Possible Causes:



Perform the gauge control module input test, and do all power, ground, and communication input tests
 
Loose or poor connections at the gauge control module and the related units
 
Faulty gauge control module
 

Trouble Code: U0155



Door Multiplex Control Unit Lost Communication With Gauge Control Module

Possible Causes:



Perform the gauge control module input test, and do all power, ground and communication input tests. If the tests prove OK, replace the gauge control module
 
Loose or poor connections at the gauge control module and the related units
 

Trouble Code: U0155



Driver's MICU Lost Communication With Gauge Control Module

Possible Causes:



Loose or poor connections at the gauge control module and the related units
 
Perform the gauge control module input test, and do all power, ground, and communication input tests. If the tests prove OK, replace the gauge control module
 

Trouble Code: U0155



Passenger's MICU Lost Communication With Gauge Control Module

Possible Causes:



Loose or poor connections at the gauge control module and the related units
 
Perform the gauge control module input test, and do all power, ground, and communication input tests. If the tests prove OK, replace the gauge control module
 

Trouble Code: U0164



Door Multiplex Control Unit Lost Communication With Climate Control Unit

Possible Causes:



Perform the door multiplex control unit input test and check the power and ground. If OK, replace the driver's power window master switch
 
Loose or poor connections between the door multiplex control unit and climate control unit.
 

Trouble Code: U0199



Driver's MICU Lost Communication With Door Multiplex Control Unit

Possible Causes:



Perform the door multiplex control unit input test, and do all power, ground, and communication input tests. If the tests prove OK, replace the power window master switch
 
Loose or poor connections at the door multiplex control unit and the related units
 

Trouble Code: U0199



Immobilizer-keyless Control Unit Lost Communication With Door Multiplex Control Unit

Possible Causes:



Perform the door multiplex control unit input test, and do all power, ground, and communication input tests. If the tests prove OK, replace the power window master switch
 
Loose or poor connections at the door multiplex control unit and the related units
 

Trouble Code: U1101



F-CAN Malfunction Powertrain Control Module (PCM) Active Control Engine Mount (ACM)

Possible Causes:



Poor connections or loose terminals at the engine mount control unit and the PCM
 
"Open" circuit between the PCM and the engine mount control unit
 
Faulty engine mount control unit
 

Trouble Code: U1280



Communication Bus Line Error (BUS-OFF)

Possible Causes:



Check battery and charging system condition
 
Perform the following input test to help find the faulty unit:
 

Door multiplex control unit (power window master switch) input test

Gauge control unit input test

Power control unit input test

Keyless access control unit input test

Remote slot control unit input test

Immobilizer-keyless control unit input test

Climate control unit power and ground circuit troubleshooting

Power seat control unit input test

HandsFreeLink control unit input test

AcuraLink control unit input test

Audio unit input test

Audio-navigation unit input test

Power tailgate control unit input test

BSI control unit input test



"Open" or "Short" between body ground and driver's under-dash fuse/relay box connector
 
Faulty driver's MICU
 

Trouble Code: U1282



Gauge Control Module Lost Communication With Driver's MICU

Possible Causes:



Perform the driver's MICU input test, and do all power, ground, and communication input tests. If the tests prove OK, replace the driver's under-dash fuse/relay box
 
Loose or poor connections at driver's under-dash fuse/relay box and the related units
 
Faulty gauge control module
 
Faulty MICU
 

Trouble Code: U1282



Door Multiplex Control Unit Lost Communication With Driver's MICU

Possible Causes:



Perform the driver's MICU input test, and do all power, ground and communication input tests
 
Loose or poor connections at driver's under-dash fuse/relay box connector and the related units
 
Faulty driver's under-dash fuse/relay box
 

Trouble Code: U1282



Immobilizer-keyless Control Unit Lost Communication With Driver's MICU

Possible Causes:



Perform the driver's MICU input test, and do all power, ground and communication input tests
 
Loose or poor connections at driver's under-dash fuse/relay box connector and the related units
 
Faulty driver's under-dash fuse/relay box
 

 
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