Features and Benefits:
The Powertrain Control Module (PCM) monitors the engine operation for misfires and counts the number of misfires that occur in a specified number of engine revolutions. Misfires generate unburned hydrocarbons and increase the load on the catalytic converter. If the misfire rate is excessive, the catalytic converter can overheat and be damaged. Under these conditions it is also likely that unburned hydrocarbons could pass through the converter, creating excessive emissions.