Malfunction Indicator Lights

NOTE: Malfunction Indicator Light (MIL) cannot be used to retrieve and display Diagnostic Trouble Codes (DTCs).

Two warning lamps in the instrument are used to indicate faults with the engine management system. The engine malfunction lamp consists of an Amber SERVICE ENGINE light and is illuminated to indicate the detection of a non emissions related fault. The Malfunction Indicator Lamp (MIL) consists of an Amber SERVICE ENGINE SOON light and is illuminated to indicate the detection of an emissions related fault.

As a bulb check, MIL indicators will illuminate when ignition switch is turned to ON position and go out when engine starts. If ECM detects an engine operation or emissions system problem, MIL indicator will be illuminated or flash, and a corresponding DTC will be stored in ECM memory. Not all DTCs will illuminate MIL. If MIL is on and no DTCs are in memory, problem may be intermittent. See INTERMITTENTS in TROUBLE SHOOTING -- NO CODES article.