One problem related to check engine light on has been reported for the 2000 Audi A6. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 Audi A6 based on all problems reported for the 2000 A6.
For an unknown reason, when the vehicle is shut down after driving, then it's re-started the engin idles rough. At that time the engine check light come on, and the engines power is reduced. It won't go faster than 15 mph.