2003 A6 3.0L stuttering and jerking [Archive] - Audi Forums

: 2003 A6 3.0L stuttering and jerking

07-25-2011, 12:07 AM
This is a problem that developed in the spring an seems to be worse in when it's hot. The car stutters and jerks intermittently, and at random times, going at random speeds, and it doesn't matter if the you are accelerating or not. It seems to be more frequent when the A/C is on. I even turn it off sometimes to try to get it to stop stuttering.
The coil packs were replaced last spring during Audi's recall. I believe they changed all of them. Seems unlikely it's something simple like a bad plug. The ESP light is on more often than it was in the winter. The CEL is always on.
Error Codes are: PO431, PO441, and PO102.

I've been researching this for a while and can find anything that really matches this problem. The car has 83K on it. Anyone have any ideas?