Detection Condition

DTC is set when PCM input signal interval time from Crankshaft Position (CKP) sensor exceeds preprogrammed criteria. While engine is running, PCM counts number of misfires that occurred at 200 crankshaft revolutions and 1000 crankshaft revolutions and calculates misfire ratio for each crankshaft revolution. If ratio exceeds preprogrammed criteria, PCM determines misfire has occurred, which can cause damage to catalytic converter and affect emission system performance. This is a continuous monitor. MIL illuminates if PCM detects malfunction in 2 consecutive drive cycles.