I was driving my 2002 Audi A4 1.8 and the warning yellow light turn on for a few second and bip. Two days later the car I can turn on the car. It is the second time that this appen. Last time I replace the alternator. A month later I have the same problem. What is wrong with the car?

SOURCE: ABS, ESP, Level warning lights (2004 Allroad TDI)

I had the brake light switch replaced by a local dealer. Cost was $140 and it fixed the problem. Have driven the car for two weeks since and no lights and all systems normal.

SOURCE: no acceleration,audi 1.8t,runs like no boost

have you tried cleaning out the throttle body as i had a similar problem and this worked

SOURCE: electrical fault Audi A4 2002

PRISE OUT THE TRIM PANEL AT THE BASE OF THE ARMREST WITH A FLAT-BLADED TOOL UNDO 2 SCREWS(DRIVERS DOOR) SINGLE SCREW ACCESSIBLE THOUGH THE ARMREST ON PASSENGER SIDE ,NOW GO TO THE BASE OF THE DOOR TRIM UNDO THE SCREW IN THE CENTRE,ONTO THE TOP TRIM NOW ABOVE THE RELEASE HANDLE,STARTING AT THE FRONT EDGE(DOOR HINGE SIDE) CAREFULLY PULL THE TRIM PANEL AWAY FROM THE DOOR TO RELEASE THE CLIPS,THEN SLIDE IT TO THE FRONT TO UNHOOK THE REAR EDGE OF THE TRIM PANEL,UNDO THE 4 SCREWS YOU CAN SEE,UNHOOK CABLE FROM REAR OF INTERIOR DOOR HANDLE,DISCONNECT WIRING PLUGS SPEAKER ,WINDOW MOTOR CONTROL UNIT AND THERE YOU HAVE IT ..EASY... IF YOU START NOW YOU WILL HAVE IT FINISHED IN 2 DAYS...ONLY JOKING....SHOULD TAKE 1 HOUR..HOPE THIS WILL BE OF SOME HELP TO YOU...LET ME KNOW HOW YOU GOT ON

SOURCE: Audi A4 Multitronic Gearbox

Make sure the multitronic fluid changes were done every 40k miles, as if they wern't, this can cause problems

SOURCE: engine number location for 2002 audi a4

is it a 1.8 turbo or 2.8 V6 or 2.7 biturbo V6 ? on most models what you will be looking for is a 3 letter code like ATQ or APW and is normally on a sticker on the timing belt cover, it is also stamped into the engine on a ledge up high. if no luck there check the owners manual, around the 3rd page there will be a sticker that was put in the book during predelivery inspection this sticker is about 3 inches by 3 inches and filled with id codes for almost everything. If the pdi wasn't done right another copy of the same sticker will be under or next to the spare tire in the spare tire well.