My gf has a 99 A4 V6 and recently it has been acting strange. The car drives and idles fine but will occasionally do the following: the ABS indicator will light up solid, the tach will fall to zero, the brake indicator will flash and, the oil pressure indicator will flash. There is also a beeping that goes along with all this. Like I say, the car will still be running, the engine doesn't stall or stumble, the transmission will shift fine and everything else is as usual. After some time all the above symptoms will cease. I don't have a FSM or Haynes/Chilton manual for her car but intend to get one to help with the diagnoses. I called the dealer today and they didn't have a clue other than to $bring $it $in. Has anyone had a similar experience or know what I may want to check? Btw, there are no CEL/MIL's. Thanks for any input.

 

Sounds like a loose ground connection in thedashboard

 

the tach rpms drop but the actual rpms dont? ^^^^yep, sounds like an electrical prob. hook er up and check for any codes then post them, autozone will do this for u for free.

 

hmm yeah if the engine isnt dropping in RPM's could be a number of things.. but if your RPM's drop it could be a bad alternator.. mine did that.