Misfire Good Trip

If the following conditions are met the PCM will count one good trip (three required) in order to turn off the MIL:

1. Operating in Similar Condition Window
2. 1000 engine revolutions with no misfire

Warm-Up Cycles 

Once the MIL has been extinguished by the Good Trip Counter, the PCM automatically switches to a Warm-Up Cycle Counter that can be viewed on a diagnostic scan tool. Warm-Up Cycles are used to erase DTCs and Freeze Frames. Forty Warm-Up cycles must occur in order for the PCM to self-erase a DTC and Freeze Frame. A Warm-Up Cycle is defined as follows:

1. Engine coolant temperature must start below and rise above 71.1° C (160° F).
2. Engine coolant temperature must rise by 4.4° C (40° F)
3. No further faults occur