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Q: Car runs perfect but check engine light is on. on 2001 Audi TT Quattro

Why could the light be on if the car has been running great? For several days Gwhit24@earthlink.net
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The check engine light indicates that there is something wrong with the emissions systems on the car. The reason it say's "check engine" is that if it said "check emissions" some folks would ignore it. Still it does indicate that there is something wrong. You need to have the fault memory checked and then address the fault.
If we can be of further help don't hesitate to contact us
Posted incorrectly last answer.
The check engine light indicates that there is something wrong with the emissions systems on the car. The reason it say's "check engine" is that if it said "check emissions" some folks would ignore it. Still it does indicate that there is something wrong. You need to have the fault memory checked and then address the fault.
If we can be of further help don't hesitate to contact us
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