Malfunction Indicator Light (Mil)
NOTE:
Not all trouble codes activate MIL.
All models are equipped with a Malfunction Indicator Light (MIL). As a bulb check, light glows when ignition is turned on and engine is not running.
On California models, MIL glows when a fault is detected with engine running. A corresponding trouble code will set in ECM memory. MIL also glows if ECM or crankshaft position sensor malfunctions.
On Federal models, MIL glows only when ECM or crankshaft position sensor malfunctions with engine running.