the epc light came on in the dash just the epc as i was parked in the car with it on just talking the idling dipped a few times it was on for about 2min then the epc light went off then i started driving it came on again the car moved slow but then went away and was fine after that. The check engine light never came on just the epc and only for a few. can any1 help oo yea the car is an audi a6 2.7t 2000

 

prolly a wheel speed sensor

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Could also be your ignition modules on top of the air box. That would better explain the drop in idle speed while at a stop.

 

thanks hooked the comp up got a bad o2 and egt sensor gonna do those and see if that fixes it