first of all guys im not sure if this is the right section as im still new to this site but basically i have a 02 a4 tdi. now i bought it from an independant garage and the day after 3 warning lights came up 1. ABS 2. ESP 3. GLOWPLUGS (this one flashes) so took it back the dealer and he hooked it up2 the computer and said that no faults were coming up but reset something or other and the lights went off, not had a problem since then outta nowhere yesterday all 3 decide to come up again. the guy at the garage said it could be a faulty sensor when it first happened but he left it at that. obviously ill be taking the car down the garage but in the meantime does this sound like a faulty sensor??