DTC Description

The PCM measures reference event times and calculates the positive and negative acceleration of the crank wheel to determine whether a misfire has occurred. When the rate of misfire exceeds a threshold where the catalyst reaches a temperature where permanent damage can occur, to the point that tail pipe emissions reach 1.5 times the tailpipe standard or where a cylinder misfire cause a loss of torque produced from that cylinder. PCM sets this DTC. In case that misfire affects Catalyst damage, MIL(Malfunction Indicator Lamp) will be illuminating and blinking at 1 HZ frequency. However, In case of Individual and Emission damaging misfire, MIL will be turned on when the malfunction is detected.

Especially, if injector connector / Ignition coil is disconnected for more than 46 sec, PCM sets DTC relating to misfire and conducts the fuel-cut to protect the catalyst.