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Intermittent Failures

WARNING: This page is about a different car, the 1991 Geo Prizm. 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 fault code will be retained in control unit memory. If fault does not reoccur within a certain time frame, related fault code will be erased from control unit memory. Intermittent failures may be caused by sensor, connector or wiring related problems. See INTERMITTENTS in TESTS W/O CODES article in the ENGINE PERFORMANCE Section.

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