Driving home today and the EPC, Traction control and ABS were all illuminated at the same time. Acceleration was slow and not eager to rev happily. Anyone have any clue what happened? Its'a facelift 00 s4. Two weeks ago I had the Miltek downpipes fitted to it (200 cell) with catback. Did this cause the problem? I went back to the car after a one hour cooling period but only the ABS and Traction light was on.