The MIL light should illuminate when the ignition switch is turned to the run position [engine not running] and go out within a few seconds after the engine is started.

Question

Quizplus · Accepted Answer

This is a normal operation for the Malfunction Indicator Lamp (MIL), also known as the Check Engine Light. It illuminates briefly to test the bulb and the system when the ignition is turned on (engine not running) and should go out a few seconds after the engine starts if no faults are detected.

The MIL Light Should Illuminate When the Ignition Switch Is