Mechanics

WONDERING WHY LIGHT IS ON

2002 Audi A6

Computer problem
2002 Audi A6 6 cyl All Wheel Drive Automatic 86500 miles

I just bought this car and stopped to fill up with gas. Now the check engine light is on. Why? When I start the car, a message appears on the instrument panel that says SERVICE then it says OK. I wonder what is going on and how to correct this issue. This car has obviously been taken VERY good care of. Can you help?
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Rkthompson
May 2, 2010.



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