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Home >> GMC >> 1991 >> Forward Control 6.2 J, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 83 (Generator & Regulator) >> Self-Diagnostic System >> Intermittent Failures
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Intermittent Failures

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Intermittent failures may cause MIL to flicker or stay on until intermittent failure goes away. However, corresponding fault code will be retained in PCM memory. If failure does not reoccur within a certain time frame (50 ignition on-off cycles), corresponding fault code will be erased from PCM memory.

Intermittent failures can be caused by faulty sensor, bad connection, or wiring related problems. See INTERMITTENTS section in appropriate TESTS W/O CODES article in ENGINE PERFORMANCE section:

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