Malfunction Indicator Lamp Always On: Description

The Powertrain Control Module (PCM) controls the Malfunction Indicator Lamp (MIL) by providing a ground path through the MIL control circuit to turn ON the MIL. When the ignition is turned ON, the MIL will remain ON until the engine is running, if no diagnostic trouble codes (DTC) are stored. If the MIL is illuminated, then the engine stalls, the MIL will remain illuminated as long as the ignition is ON.