Intermittent Failures
WARNING: This page does not describe the selected car, but rather 17 other vehicles, including the 1991 Plymouth Colt Vista, 1991 Plymouth Colt, 1991 Mitsubishi Mirage, 1991 Mitsubishi Galant, and 1991 Mitsubishi Eclipse. However, it is still accessible from the selected car via links, so may be relevant.
Intermittent failures may cause CHECK ENGINE light to flicker or illuminate and go out after the intermittent fault goes away. However, the corresponding trouble code will be retained in ECU memory. If related fault does not reoccur within a certain time frame, related trouble code will be erased from ECU memory. Intermittent failures may be caused by a sensor, connector or wiring related problems. See INTERMITTENTS in TESTS W/O CODES article.