OBD-II Trouble Codes

Discussion in 'SN95 4.6L Mustang Tech' started by Malevolyn, Jan 10, 2006.


  1. Malevolyn

    Malevolyn New Member

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    Location:
    Lakeland, FL
    So far, I've never seen a link to a list of codes when someone asks what a particular code means, so I made one. I'll do the OBD-I codes later because there's 3 pages of those.

    Code:
    OBD-II Trouble Codes
    
    Code		Probable Cause
    ----		--------------
    P0102		Mass Airflow (MAF) sensor circuit low input
    P0103		Mass Airflow (MAF) sensor circuit high input
    P0112		Intake Air Temperature (IAT) sensor circuit low input
    P0113		Intake Air Temperature (IAT) sensor circuit high input
    P0117		Electronic Coolant Temperature (ECT) sensor low input
    P0118		Electronic Coolant Temperature (ECT) sensor high input
    P0121		In range Throttle Position Sensor (TPS) fault (aka, problem with TPS reports)
    P0122		Throttle Position Sensor (TPS) circuit low input
    P0123		Throttle Position Sensor (TPS) circuit high input
    P0131		Upstream heated O2 sensor circuit low voltage (Bank 1)
    P0133		Upstream heated O2 sensor circuit slow response (Bank 1)
    P0135		Upstream heated O2 sensor heater circuit fault (Bank 1)
    P0136		Downstream heated O2 sensor fault (Bank 1)
    P0141		Downstream heated O2 sensor heater circuit fault (Bank 1)
    P0151		Upsteam heated O2 sensor circuit low voltage (Bank 2)
    P0153		Upstream heated O2 sensor circuit slow response (Bank 2)
    P0155		Upstream heated O2 sensor heater circuit fault (Bank 2)
    P0156		Downstream heated O2 sensor fault (Bank 2)
    P0161		Downstream heated O2 sensor heater circuit fault (Bank 2)
    P0171		System Adaptive fuel too lean (Bank 1)
    P0172		System Adaptive fuel too rich (Bank 1)
    P0174		System Adaptive fuel too lean (Bank 2)
    P0175		System Adaptive fuel too rich (Bank 2) (Said P0172 in Haynes)
    P0191		Injector Pressure sensor system performance
    P0192		Injector Pressure sensor circuit low input
    P0193		Injector Pressure sensor circuit high input
    
    P0301		Cylinder no. 1 misfire detected
    P0302		Cylinder no. 2 misfire detected
    P0303		Cylinder no. 3 misfire detected
    P0304		Cylinder no. 4 misfire detected
    P0305		Cylinder no. 5 misfire detected
    P0306		Cylinder no. 6 misfire detected
    P0307		Cylinder no. 7 misfire detected
    P0308		Cylinder no. 8 misfire detected
    P0325		Knock sensor circuit fault
    P0326		Knock sensor circuit performance
    P0351		Ignition coil no. 1 primary circuit fault
    P0352		Ignition coil no. 2 primary circuit fault
    P0353		Ignition coil no. 3 primary circuit fault
    P0354		Ignition coil no. 4 primary circuit fault
    P0355		Ignition coil no. 5 primary circuit fault
    P0356		Ignition coil no. 6 primary circuit fault
    P0357		Ignition coil no. 7 primary circuit fault
    P0358		Ignition coil no. 8 primary circuit fault
    
    P0400		EGR flow fault
    P0401		EGR insufficient flow detected
    P0402		EGR excessive flow detected
    P0420		Catalyst system efficiency below threshold (Bank 1)
    P0421		Catalyst system efficiency below threshold (Bank 1)
    P0430		Catalyst system efficiency below threshold (Bank 2)
    P0431		Catalyst system efficiency below threshold (Bank 2)
    P0442		EVAP small leak detected
    P0443		EVAP VMV circuit fault
    P0452		EVAP fuel tank pressure sensor low input
    P0453		EVAP fuel tank pressure sensor high input
    
    P0500		VSS fault
    P0505		IAC valve system fault
    
    P0603		PCM Keep Alive Memory test error
    P0605		PCM Read Only Memory test error

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