Malfunction Indicator Lamp

The Malfunction Indicator Lamp (MIL) alerts the driver that the Powertrain Control Module (PCM) has detected an OBD II emission-related component or system fault. When this occurs, an OBD II Diagnostic Trouble Code (DTC) will be set.
- The MIL is located on the instrument panel and is labeled CHECK ENGINE.
- Power is supplied to the MIL whenever the ignition switch is in the RUN or START position.
- The MIL will remain ON in the RUN/START mode as a bulb check until the CKP signal is detected.
- The light may also be ON due to a short to ground of the MIL circuit, or operation in the Hardware Limited Operation Strategy (HLOS).
- To turn OFF the MIL after a repair, a reset command from the Scan Tool must be sent, or three consecutive drive cycles must be completed without a fault.