A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

check engine light came on.......

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Old 04-18-2001, 05:27 PM
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Default check engine light came on.......

I have a GIAC chip in my 00' A4, and my check engine light came on. Upon the initial ignition, the engine reved as usual, then settled very quickly into it's normal idle rpm, with no warm-up period. seemed out of the ordinary. I'm going to take it to the dealer, but was wondering if anyone has had a similar experience and what it was.

Thanks,
Tom
Old 04-18-2001, 05:31 PM
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Default '00 A4 GIAC, never a problem. Is the dealer chip friendly and....

have you tried to but back in the stock chip to see what the light does?
Old 04-18-2001, 06:16 PM
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Default I reinstalled my original chip, and the light is still on....

I don't think it's running very well either. I did have the GIAC chip in for over 25K. Hope nothing serious is wrong.

we'll see.

thanks
Old 04-18-2001, 06:19 PM
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Leave in the stock chip and take that puppy in.
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