99AudiQuattro28

Hello,

I just bought a 99 Audi A6 2.8 Quattro for 1400 with 155k. The car radio wasn't working so I couldn't use the OBDII port to diagnose the check engine light. I finally got power to the radio but its in safe mode. I had these 6 check engine codes:

1857
1545
1626
0102
1300
1600

I reset the check engine codes and the one that keeps coming back is 1545. The car feels very sluggish. It also does not have reverse.. You start the car and it dies right away unless you rev it until it warms up. The car also jerks around back and forth when you take off. What could be wrong? Could it be a bad transmission? I was told there is a sensor on the transmission that could of gotten wet and cause reverse to malfunction. The previous owner stated he replaced the tranmission computer because it was filled with water but I believe its the original cause it was still wet.. I bought this car as a fixer upper so my fiancee can drive it. Please let me know.

Thanks

Edd W

Engine warmup issue could simply be the coolant temp sensor - on the pipe which connects the rear of the heads just under the MAF - it has a three or four wire connector and is held in by a horseshoe type clip which pulls out to one side. Get a new clip and O ring with the sensor. If it is cold - you should not loose much coolant.

old96A4

If its like the most 2.8's the EGR system and the vacumn lines get all dirty. replace the vacumn lines and clean the EGR. the car won't idle correctly when this stuff is all dirty or leaking. NOt sure if the codes show that or not. I'd have to look at those codes to figure it out.. there is a bunch of information on this fourm about the 2.8.

Edd W

Good point.