Conditions required to set code are:
- No transaxle or VSS DTCs set.
- No CKP, CMP, ECT, MAF or TP sensor DTCs set.
- Engine speed 450-5800 RPM.
- ECT 19-248°F (-7-120°C).
- Throttle steady.
- PCM detects crankshaft RPM variation, indicating a misfire which could cause catalytic convertor damage or high emissions.