Honda Cars 2007-2008

2.4L L4 VIN - Std 5

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Trouble Code: P0420



Catalytic System Efficiency Below Threshold

Possible Causes:



Air leaks in at the exhaust manifold or exhaust pipes
 
Poor fuel quality
 
Catalytic converter damaged or has failed (deteriorated)
 
Front HO2S is more aged than the rear HO2S (HO2S is lazy)
 
Faulty Secondary HO2S (Sensor 2)
 
PCM has failed
 

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
 

Trouble Code: P0499



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

Possible Causes:



Poor connections or loose terminals at the EVAP canister vent shut valve and the PCM
 
PCM may need to be updated with the latest software
 
Faulty PCM
 
Faulty EVAP canister vent shut valve
 

Trouble Code: P0506



Idle Control System RPM Lower Than Expected

Possible Causes:



Dirt, carbon, or damage in the throttle bore
 
Damaged air cleaner element
 
Incorrect DATA LIST parameter conditions
 
Poor connections or loose terminals at the throttle body and the PCM
 
Faulty throttle body
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0507



Idle Control System RPM Higher Than Expected

Possible Causes:



Vacuum leaks
 
Faulty PCV valve
 
Dirty throttle bore
 
Faulty EVAP canister purge valve
 
Poor connections or loose terminals at the throttle body and the PCM
 
Improper PCM idle learn procedure
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P050A



Cold Start Idle Air Control System Performance Problem

Possible Causes:



Dirty air cleaner element
 
Damage air cleaner element or housing
 
Dirty or damaged throttle bore
 
Poor connections or loose terminals at the throttle body, the MAF sensor/IAT sensor
 
Faulty throttle body
 
Faulty MAF sensor/IAT sensor
 

Trouble Code: P050B



Cold Start Ignition Timing Control System Performance Problem

Possible Causes:



Poor connections or blockage at the air intake duct
 
Damaged air cleaner housing or dirty air cleaner
 
Damaged CKP sensor and/or the CKP sensor pulser plate
 
Faulty throttle body
 
Dirty or faulty MAF sensor/IAT sensor 1
 
Faulty ECT SENSOR 1 and/or ECT SENSOR 2
 
Check and repair any problems with the following items, Engine compression, VTEC system, Engine oil, A/C system, Power steering system
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P0511



Idle Air Control (IAC) Valve Circuit Malfunction

Possible Causes:



"Open" or "Short" between the ECM/PCM and IAC
 
"Open" or "Short" between the PGM-FI relay 1 and IAC
 
Fauty IAC
 
ECM/PCM needs to be updated with the latest software
 
Faulty ECM/PCM
 

Trouble Code: P0562



Charging System Low Voltage

Possible Causes:



Faulty battery, or connections
 
Faulty alternator
 
Poor connections or loose terminals at the alternator and the main under-hood fuse box
 

Trouble Code: P0563



Engine Control Module (ECM) Powertrain Control Module (PCM) Power Source Circuit Unexpected Voltage

Possible Causes:



Faulty PGM-FI main relay 1
 
Poor connections or loose terminals under-hood fuse/relay box (PGM-FI main relay 1) and the fuse
 
"Short" to power in the wire between the PCM (PGM-FI main relay 1)
 
ECM/PCM may need to be updated with the latest software
 
Faulty ECM/PCM
 

Trouble Code: P0602



ECM/PCM Programming Error

Possible Causes:



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

Trouble Code: P0606



ECM/PCM Processor Malfunction

Possible Causes:



ECM/PCM may need to be updated with the latest software
 
Faulty ECM/PCM
 

Trouble Code: P062F



ECM/PCM Internal Control Module Keep Alive Memory (KAM) Error

Possible Causes:



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

Trouble Code: P0630



VIN Not Programmed or Mismatch

Possible Causes:



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

Trouble Code: P0685



ECM/PCM Power Control Circuit Malfunction

Possible Causes:



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

Trouble Code: P1009



Variable Valve Timing Control (VTC) Advance Malfunction

Possible Causes:



Clogged VTC strainer (A)
 
Clogged oil passages at the VTC system
 
Faulty VTC oil control solenoid valve
 
Faulty VTC actuator
 

Trouble Code: P1109



Barometric Pressure (BARO) Sensor Circuit Out of Range High

Possible Causes:



PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P1116



Engine Coolant Temperature (ECT) Sensor 1 Circuit Range/Performance Problem

Possible Causes:



Poor connections or loose terminals at ECT sensor 1 and ECT sensor 2
 
Faulty ECT sensor 1
 
Faulty ECT sensor 2
 

Trouble Code: P1128



Manifold Absolute Pressure (MAP) Sensor Signal Lower Than Expected

Possible Causes:



Dirty air cleaner element
 
Poor connections or loose terminals at the MAP sensor and the PCM
 
Faulty MAP sensor
 

Trouble Code: P1129



MAP Sensor Signal Higher Than Expected

Possible Causes:



Vacuum leaks
 
Poor connections or loose terminals at the MAP sensor and the PCM
 
Faulty MAP sensor
 

Trouble Code: P1157



Air Fuel Ratio (A/F) Sensor (Sensor 1) AFS Line High Voltage

Possible Causes:



Poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM
 
"Open" circuit between the ECM/PCM and the A/F sensor (Sensor 1)
 
Faulty A/F sensor (Sensor 1)
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P1172



Air/Fuel Ratio (A/F) Sensor (Sensor 1) Circuit Out of Range High

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: P1297



Electrical Load Detector (ELD) Circuit Low Voltage

Possible Causes:



Poor connections or loose terminals at the ELD and the PCM
 
"Short" circuit between the PCM and the ELD
 
Faulty left side engine compartment wire harness
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P1298



Electrical Load Detector (ELD) Circuit High Voltage

Possible Causes:



Blown fuse
 
Poor connections or loose terminals at the ELD and the PCM
 
"Open" circuit between the fuse in the under-dash fuse/relay box and the ELD
 
"Open" in the wire between the ELD and ground
 
Faulty left side engine compartment wire harness
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P1454



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

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: P145C



Evaporative Emission (EVAP) System Purge Flow Malfunction

Possible Causes:



Troubleshoot appropriate DTCs
 

Trouble Code: P1549



Charging System High Voltage

Possible Causes:



Poor connections or loose terminals at the alternator and the main under-hood fuse box
 
Faulty alternator
 

Trouble Code: P15BE



Camshaft Position (CMP) Sensor Signal Malfunction

Possible Causes:



Poor connections or loose terminals at the engine mount control unit and the PCM
 
"Open" or "Short" to ground between the engine mount control unit and PCM
 
Faulty engine mount control unit
 
PCM may need to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P1658



Electronic Throttle Control System (ETCS) Control Relay ON Malfunction

Possible Causes:



Poor connections or loose terminals at the under-hood fuse/relay box (ETCS control relay) and the PCM
 
"Short" in the wire between the PCM and the under-hood fuse/relay box (ETCS control relay)
 
"Short" to power in the wire between the PCM and the under-hood fuse/relay box (ETCS control relay)
 
Faulty relay control module (under-hood fuse/relay box)
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

Trouble Code: P1659



Electronic Throttle Control System (ETCS) Control Relay OFF Malfunction

Possible Causes:



Blown fuse
 
Poor connections or loose terminals at the under-hood fuse/relay box (ETCS control relay) and the PCM
 
"Open" or "Short" in the wire between the PCM and the under-hood fuse/relay box
 
Faulty right side engine compartment wire harness
 
Faulty relay control module (under-hood fuse/relay box)
 
PCM needs to be updated with the latest software
 
Faulty PCM
 

 
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