Honda Cars 2007-2008

3.0L V6 VIN - Auto 4

Print

Trouble Code: P0157



Front Secondary HO2S (Bank 2, Sensor 2) Circuit Low Voltage

Possible Causes:



Poor connections or loose terminals at the secondary HO2S (Sensor 2) and the PCM
 
"Open" or "Short circuit between the PCM and the secondary HO2S (Sensor 2)
 
Faulty secondary HO2S (Sensor 2)
 
Faulty PCM
 

Trouble Code: P0158



Front Secondary HO2S (Bank 2, Sensor 2) Circuit High Voltage

Possible Causes:



Poor connections or loose terminals at the secondary HO2S (Sensor 2) and the PCM
 
"Open" circuit between the PCM and the secondary HO2S (Sensor 2)
 
Faulty (Secondary HO2S (Bank 1, Sensor 2)
 
Faulty PCM
 

Trouble Code: P0159



Front Secondary HO2S (Bank 2, Sensor 2) Slow Response

Possible Causes:



Poor connections or loose terminals at the secondary HO2S (Sensor 2) and the PCM
 
Faulty Front Secondary HO2S (Bank 2, Sensor 2)
 
Faulty PCM
 

Trouble Code: P0161



Front Secondary HO2S (Bank 2, Sensor 2) Heater Circuit Malfunction

Possible Causes:



Poor connections or loose terminals at the front secondary HO2S (Sensor 2), the relay and the PCM
 
"Open" or "Short circuit between the PCM and the front secondary HO2S (Sensor 2)
 
Faulty PCM
 

Trouble Code: P0171



Rear Bank (Bank 1) Fuel System Too Lean

Possible Causes:



Vacuum leaks
 
Clogged fuel filter
 
Faulty fuel pump or regulator
 
Faulty MAF sensor/IAT sensor
 
Faulty EVAP canister purge valve
 
Faulty Throttle body
 
Faulty fuel injectors
 

Trouble Code: P0172



Rear Bank (Bank 1) Fuel System Too Rich

Possible Causes:



Faulty fuel pump or regulator
 
Engine valve clearance
 
Faulty coolant temp sensor
 
Faulty MAF sensor/IAT sensor
 
Faulty EVAP canister purge valve
 
Faulty Throttle body
 
Faulty fuel injectors
 

Trouble Code: P0174



Front Bank (Bank 2) Fuel System Too Lean

Possible Causes:



Vacuum leaks
 
Clogged fuel filter
 
Faulty fuel pump or regulator
 
Faulty MAF sensor/IAT sensor
 
Faulty EVAP canister purge valve
 
Faulty Throttle body
 
Faulty fuel injectors
 

Trouble Code: P0175



Front Bank (Bank 2) Fuel System Too Rich

Possible Causes:



Faulty fuel pump or regulator
 
Engine valve clearance
 
Faulty coolant temp sensor
 
Faulty MAF sensor/IAT sensor
 
Faulty EVAP canister purge valve
 
Faulty Throttle body
 
Faulty fuel injectors
 

Trouble Code: P0222



Throttle Position (TP) Sensor B Circuit Low Voltage

Possible Causes:



Poor connections or loose terminals at the throttle body and the PCM
 
"Open" or "Short" circuit between the throttle body and the PCM
 
Faulty throttle body
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0223



Throttle Position (TP) Sensor B Circuit High Voltage

Possible Causes:



Poor connections or loose terminals at the throttle body and the PCM
 
"Open" or "Short" between the throttle body and the PCM
 
PCM may need to be updated with the latest software
 
Faulty throttle body
 
Faulty PCM
 

Trouble Code: P0300



Random Misfire Detected

Possible Causes:



Poor fuel quality
 
Clogged fuel filter
 
Faulty spark plugs
 
Faulty Fuel pump and/or regulator
 
Poor connections or loose terminals at the ignition coil, the injector, and the PCM
 
Check the CKP pattern learn procedure
 

Trouble Code: P0301



Cylinder 1 Misfire Detected

Possible Causes:



Faulty spark plug
 
Faulty ignition coil
 
Faulty fuel injector
 
Faulty fuel pump and/or regulator
 
Poor connections or loose terminals at the ignition coil, the injector, and the PCM
 
"Open" or "Short" circuit between the ignition coil and the under-hood fuse/relay box
 
"Open" or "Short" circuit between the PCM and the ignition coil
 
Internal engine problem
 
Incorrect PCM idle learn procedure
 
Incorrect CKP pattern learn procedure
 
MAF sensor
 

Trouble Code: P0302



Cylinder 2 Misfire Detected

Possible Causes:



Faulty spark plug
 
Faulty ignition coil
 
Faulty fuel injector
 
Faulty fuel pump and/or regulator
 
Poor connections or loose terminals at the ignition coil, the injector, and the PCM
 
"Open" or "Short" circuit between the ignition coil and the under-hood fuse/relay box
 
"Open" or "Short" circuit between the PCM and the ignition coil
 
Internal engine problem
 
Incorrect PCM idle learn procedure
 
Incorrect CKP pattern learn procedure
 
MAF sensor
 

Trouble Code: P0303



Cylinder 3 Misfire Detected

Possible Causes:



Faulty spark plug
 
Faulty ignition coil
 
Faulty fuel injector
 
Faulty fuel pump and/or regulator
 
Poor connections or loose terminals at the ignition coil, the injector, and the PCM
 
"Open" or "Short" circuit between the ignition coil and the under-hood fuse/relay box
 
"Open" or "Short" circuit between the PCM and the ignition coil
 
Internal engine problem
 
Incorrect PCM idle learn procedure
 
Incorrect CKP pattern learn procedure
 
MAF sensor
 

Trouble Code: P0304



Cylinder 4 Misfire Detected

Possible Causes:



Faulty spark plug
 
Faulty ignition coil
 
Faulty fuel injector
 
Faulty fuel pump and/or regulator
 
Poor connections or loose terminals at the ignition coil, the injector, and the PCM
 
"Open" or "Short" circuit between the ignition coil and the under-hood fuse/relay box
 
"Open" or "Short" circuit between the PCM and the ignition coil
 
Internal engine problem
 
Incorrect PCM idle learn procedure
 
Incorrect CKP pattern learn procedure
 
MAF sensor
 

Trouble Code: P0305



Cylinder 5 Misfire Detected

Possible Causes:



Faulty spark plug
 
Faulty ignition coil
 
Faulty fuel injector
 
Faulty fuel pump and/or regulator
 
Poor connections or loose terminals at the ignition coil, the injector, and the PCM
 
"Open" or "Short" circuit between the ignition coil and the under-hood fuse/relay box
 
"Open" or "Short" circuit between the PCM and the ignition coil
 
Internal engine problem
 
Incorrect PCM idle learn procedure
 
Incorrect CKP pattern learn procedure
 
MAF sensor
 

Trouble Code: P0306



Cylinder 6 Misfire Detected

Possible Causes:



Faulty spark plug
 
Faulty ignition coil
 
Faulty fuel injector
 
Faulty fuel pump and/or regulator
 
Poor connections or loose terminals at the ignition coil, the injector, and the PCM
 
"Open" or "Short" circuit between the ignition coil and the under-hood fuse/relay box
 
"Open" or "Short" circuit between the PCM and the ignition coil
 
Internal engine problem
 
Incorrect PCM idle learn procedure
 
Incorrect CKP pattern learn procedure
 
MAF sensor
 

Trouble Code: P0325



Knock Sensor Circuit Malfunction

Possible Causes:



Poor connections or loose terminals at the knock sensor and the PCM
 
"Open" or "Short" circuit between the PCM and the knock sensor sub-harness
 
"Open" or "Short" circuit in the knock sensor subharness
 
Poor connections or loose terminals at the ignition coil, the injector, and the PCM
 
Faulty knock sensor
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0335



Crankshaft Position (CKP) Sensor A No Signal

Possible Causes:



Poor connections or loose terminals at CKP sensor A and the PCM
 
"Open" or "Short" in the wire between the PCM and CKP sensor A
 
Faulty CKP sensor A
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0339



Crankshaft Position (CKP) Sensor A Intermittent Interruption

Possible Causes:



Poor connections or loose terminals at CKP sensor A/B and the ECM/PCM
 
Poor connections at engine ground and/or body ground
 
Damaged CKP sensor A/B pulse plate on the timing belt drive pulley
 
Faulty CKP sensor
 

Trouble Code: P0340



Camshaft Position (CMP) Sensor No Signal

Possible Causes:



Poor connections or loose terminals at the CMP sensor and the PCM
 
"Open" circuit between the CMP sensor and PGM-FI main relay
 
"Open" or "Short" circuit between the PCM and the CMP sensor
 
"Open" in the wire between the CMP sensor and ground
 
Faulty CMP sensor
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0344



Camshaft Position (CMP) Sensor Circuit Intermittent Interruption

Possible Causes:



Poor connections or loose terminals at the CMP sensor and the ECM/PCM
 
Poor connections or loose terminal at the engine and/or body ground
 
Damaged CMP sensor pulse projection on the front camshaft pulley
 
Faulty CMP sensor
 

Trouble Code: P0385



Crankshaft Position (CKP) Sensor B No Signal

Possible Causes:



Poor connections or loose terminals at CKP sensor A/B and the ECM/PCM
 
"Open" circuit between CKP sensor A/B and PGM-FI main relay 1 (FI MAIN)
 
"Open" or "Short" circuit between the ECM/PCM and CKP sensor A/B
 
"Open" in the wire between CKP sensor A/B and ground
 
ECM/PCM needs to be updated with the latest software, or substitute a known-good ECM/PCM
 
Faulty CKP sensor
 

Trouble Code: P0389



Crankshaft Position (CKP) Sensor B Intermittent Interruption

Possible Causes:



Poor connections or loose terminals at CKP sensor A/B and the PCM
 
Poor grounds at engine, body, CKP sensor A/B or PCM
 
Damaged CKP sensor A/B pulse plate/timing belt drive pulley
 
Faulty CKP sensor A/B
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0401



Exhaust Gas Recirculation (EGR) Insufficient Flow

Possible Causes:



Clogged intake manifold, and/or EGR ports
 
Poor connections or loose terminals at the EGR valve and the PCM
 
Faulty EGR valve
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0404



Exhaust Gas Recirculation (EGR) Control Circuit Range/Performance Problem

Possible Causes:



Carbon build-up on the EGR valve
 
Faulty EGR valve
 
Poor connections or loose terminals at the EGR valve and the PCM
 
"Short" or "Short" between the PCM and the EGR valve
 
"Open" in the wire between the EGR valve and ground
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0406



Exhaust Gas Recirculation (EGR) Valve Position Sensor Circuit High Voltage

Possible Causes:



Poor connections or loose terminals at the EGR valve and the PCM
 
"Open" circuit between the EGR valve and the PCM
 
PCM may need to be updated with the latest software
 
Faulty EGR valve
 
Faulty PCM
 

Trouble Code: P0420



Rear Bank Catalyst System Efficiency Below Threshold (Bank 1)

Possible Causes:



Poor connections or loose terminals at the secondary HO2S (sensor 2) and the PCM
 
Faulty (Bank 1) WU-TWC
 

Trouble Code: P0430



Front Bank Catalyst System Efficiency Below Threshold (Bank 2)

Possible Causes:



Poor connections or loose terminals at the secondary HO2S (sensor 2) and the PCM
 
Faulty (Bank 2) WU-TWC
 

Trouble Code: P0443



Evaporative Emission (EVAP) Canister Purge Valve Circuit Malfunction

Possible Causes:



Poor connections or loose terminals at the EVAP canister purge valve and the PCM
 
"Open" or "short" between the EVAP canister purge valve and the PCM
 
"Open" or "short" between the EVAP canister purge valve and the under-dash fuse/relay box
 
EVAP canister purge valve
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0451



Fuel Tank Pressure (FTP) Sensor Circuit Range/Performance Problem

Possible Causes:



Poor connections or loose terminals at the FTP sensor and the PCM
 
Faulty FTP sensor
 

Trouble Code: P0452



Fuel Tank Pressure (FTP) Sensor Circuit Low Voltage

Possible Causes:



Poor connections or loose terminals at the FTP sensor and the PCM
 
"Open" or "Short" in the wire(s) between the PCM and the FTP sensor
 
Faulty FTP sensor
 

Trouble Code: P0456



EVAP System Very Small Leak Detected

Possible Causes:



Faulty or loose fuel fill cap
 
Poor connection or damage at the fuel tank vapor control valve hose
 
Poor connections or loose terminals at the FTP sensor, the EVAP canister
 



Faulty EVAP canister vent shut valve
 
Faulty FTP sensor O-ring
 
Faulty fuel tank vapor control valve hose
 
Faulty EVAP canister vent shut valve case and O-ring
 
Faulty EVAP canister
 
Faulty fuel tank unit base gasket, and/or fuel tank
 

Trouble Code: P0457



Evaporative Emission (EVAP) System Leak Detected/Fuel Fill Cap Loose or Missing

Possible Causes:



Faulty fuel fill cap seal missing or damaged, fuel fill pipe damaged
 
Poor connections or loose terminals at the FTP sensor, the EVAP canister vent shut valve, and the PCM
 
Faulty routing of the EVAP canister vent tube
 
Faulty EVAP canister vent shut valve
 

Trouble Code: P0461



Fuel Level Sensor (Fuel Gauge Sending Unit) Range/Performance Problem

Possible Causes:



Poor connections or loose terminals at the fuel gauge sending unit and the gauge control module
 
Faulty fuel gauge sending unit
 

Trouble Code: P0462



Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit Low Voltage

Possible Causes:



Poor connections or loose terminals at the gauge control module, the fuel gauge sending unit, and the secondary fuel gauge sending unit
 
"Short" circuit between the gauge control module (signal line) and the fuel gauge sending unit
 
Faulty fuel gauge sending unit
 
Faulty gauge control module
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0463



Fuel Level Sensor (Fuel Gauge Sending Unit) Circuit High Voltage

Possible Causes:



Poor connections or loose terminals at the gauge control module and the fuel gauge sending unit
 
"Open" in the wire between the gauge control module (GND line) and the fuel gauge sending unit
 
"Open" in the wire between the gauge control module (signal line) and the fuel gauge sending unit
 
Faulty fuel gauge sending unit
 
Faulty gauge control module
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0496



Evaporative Emission (EVAP) System High Purge Flow Detected

Possible Causes:



Poor connections or loose terminals at the FTP sensor, the EVAP canister purge valve, the EVAP canister vent shut valve, and the PCM
 
Faulty EVAP canister purge valve
 

Trouble Code: P0497



Evaporative Emission (EVAP) System Low Purge Flow Detected

Possible Causes:



Faulty or Loose fuel fill cap
 
Poor connections or loose terminals at the FTP sensor, the EVAP canister purge valve, the EVAP canister vent shut valve, and the PCM
 
Blockage in the vacuum hose between the EVAP canister purge valve and the EVAP canister
 
Faulty EVAP canister purge valve
 

Trouble Code: P0498



Evaporative Emission (EVAP) Canister Vent Shut Valve Control Circuit Low Voltage

Possible Causes:



Poor connections or loose terminals at the EVAP canister vent shut valve and the PCM
 
"Open" or "Short" in the wire between the EVAP canister vent shut valve and the PCM
 
"Open" in the wire between the EVAP canister vent shut valve and the under-hood fuse/relay box (PGM-FI sub-relay)
 
Faulty EVAP canister vent shut valve
 

 
label.common.footer.alt.autozoneLogo