Operation CHARM: Car repair manuals for everyone.

Malfunction Indicator Lamp: Service and Repair

CHECK ENGINE LIGHT RESET OPERATION

Disconnect ECU or battery to clear all codes.

NOTE: All idle control adaptations are lost when the battery or ECU is disconnected. The vehicle will need to be driven a minimum of 6 minutes and let idle at least 10 minutes, so the control unit can relearn idle speed, timing and mixture parameters. The engine must be at operating temperature, throttle switch for idle position closed or adaptation will not take place.