OBD-0 CEL definitions

[azcrx]

I noticed a lot of ppl ask this question so I took the right out of my Integra Haynes repair manual. If this needs to be moved sorry for puttin this in the wrong spot. Just figured more ppl in this forum would use this listin than anywhere else.


Code 0 - Faulty ECM - Check ECM electrical connector. If no loose connectors are found, have the ECM diagnosed by a dealer service department or other qualified repair shop. AKA get a new ECU.

Code 1 - Oxygen content - Check the oxygen sensor, heater and the oxygen sensor circuit

Code 3 and 5 - Manifold Absolute Pressure

Code 4 - Crankshaft Position Sensor

Code 6 - Coolant temperature

Code 7 - Throttle Position Sensor

Code 8 - Top Dead Center Position - Check sensor

Code 9 - No. 1 Cylinder Position

Code 10 - Intake Air Temperature Sensor

Code 12 - Exhaust Gas Recircuilation - check hoses, the EGR valve lift sensor, and the EGR valve

Code 13 - Barometric Pressure - have vehicle checked at a dealer or sevice department or other quilified repair shop

Code 14 - Idle Air Control Valve

Code 15 - Ignition Output Signal

Code 16 - Fuel Injector - Check fuel injection system and injectors

Code 17 - Vehicle Speed Sensor

Code 21 - Variable Valve Timing and Valve Lift Solenoid

Code 22 - Variable Valve Timing and Control Pressure Switch

Code 23 - Knock Sensor

Code 41 - Oxygen Sensor Heater - Check heater for proper voltage signal

Code 43 - Fuel Supply System - Check fuel pressure, fuel pressure regulator, check oxygen sensor, check for vacuum leaks. Usually bad O2 sensor