Not sure, but the EPC is for engine electronics so it has to be an electrical problem. If you know somebody witha Vag-com the should be able to pull the code that caused the EPC light to come on and that may lead you in the right direction.


Edit- I know VW's can have the brake light switch fail sometimes, this will trip the EPC light, and supposedly your cruise control might not work. Not sure if this is the case for Audi's, but if his brake light switch wasn't working, and he tried to set the cruise it may have caused it to go into limp mode when it detected 2 errors. My brake light switch failed for about 2 hours once, EPC light came on, but the car ran fine, next morning the EPC went off and everything was fine.