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Home >> Audi >> 1998 >> A4 Avant >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Introduction >> Self-Diagnostic System >> Intermittent Failures
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Intermittent Failures

When an intermittent failure occurs, MIL comes on and a Diagnostic Trouble Code (DTC) sets. Powertrain Control Module (PCM) stores DTC as sporadic. Intermittent (sporadic) failures will be erased by PCM if failure does not occur again within 40 engine starts on Cabriolet, or after 50 engine starts with engine reaching operating temperature on 1.8L and 2.8L (except Cabriolet). Intermittent failures may be caused by problems with a sensor, connector or wiring. See INTERMITTENTS in TESTS W/O CODES article.