Hi, could anyone please help, I have an 05 plate, A3 2.0 TDi that is showing the engine management symbol on the dash. A pal who is a VW enthusiast and mechanic tested the car on his VAG-COM and two fault codes, P2100 and P2102 were listed. My friends book is somewhat out of date and he suggested I try this site for a possible answer. I would be very grateful if anyone could tell me which areas these codes refer to. Many thanks.