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. PCM sets P0300. In case that misfire affects Catalyst damage, MIL (Malfunction Indication 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 is disconnected for more than 46 sec, PCM sets DTC relating to misfire and conducts the fuel-cut to protect the catalyst.