ok..I posted earlier about a problem Ive been having w my 2001 a6 2.7t tip..Under fairly hard to hard accelleration, while usually, but not always going up-hill, at 50 or so mph and up while the RPMS are above 3-3500, my ESP starts flashing and engaging, on dry and fairly even pavement..I thought this could be related to a dirty MAF sensor, but I jsut cleaned it w rubbing alcohol, seemed to get all of the grime off of it, took it for a drive and its still doing the same thing...Any input would be appreciated.

 

the esp light should have nothing to do with the maf. Last time I had esp light flashes it was a wheel speed sensor. Have you had any recent maintenance?

 

Probably a bad connector or sensor at the wheel.

 

I had a control arm and axle replaced but this was happening before that...Where is the wheel speed sensor?

 

The speed sensor is a little black cap opposite the calipers. It has to be spaced just right to work and pushed all the way is not right. it needs about 2-4mm of space between the sensor ring to work properly. Pull the thing and fiddle with it until you get it right, aka, push it all the way in and back it out bit by bit. Its too close if you get ESP and ABS lights will click on around 30 mph.

 

Yep my guess is wheel speed sensor too, try cleaning them or pushing them in further.