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Author Message   Dfbutler Posted on Monday, June 02, 2008 - 12:05 am:        I've encountered a strange situation. On my 99 S3 after a "spirited" ride, followed by short stop, when I start riding again the check engine light comes on a few minutes later and stays on for a minute or two and goes off. Suggestions?   Brokeneck Posted on Monday, June 02, 2008 - 01:57 am:        Which sensor could it be ???   Jos51700 Posted on Monday, June 02, 2008 - 08:54 am:        Possible 02 sensor out of range (It is ignored at elevated throttle openings, and when it goes back to closed loop tosses a code). Also, it could be an Engine Temp sensor, predicting a potential (or untrue) engine overheat. A little heat soak goes along way. Or, it could any other sensor heat-soaking and pooping, for that matter, but without driveability issues, I doubt that.   Jos51700 Posted on Monday, June 02, 2008 - 08:56 am:        I predict the 02 sensor, BTW, just because it takes awhile before it tosses its code-cookies, and the bike will ignore 02 sensor readings after a restart for, I believe, two minutes.   Davefl Posted on Monday, June 02, 2008 - 10:34 am:        Why don't you read the codes and let the ecm tell you what sensor is at fault?

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