kingsalami

(Cross posted in the Q5 forum, too)
Long time lurker with just a few posts...I hope I'm posting in the correct forum here.
I used Carista to pull a couple fault codes on my wife's 2012 Q5 3.2. It showed a bad side marker bulb and this fault for the engine controller:
P2857 Clutch A Pressure Engagement Performance

I reset the code twice, but this one keeps popping back up. I Googled the code exhaustively, but wasn't able to find any information on it.

I initially thought it was a transmission fault, so I engaged Sport mode and hammered on it a few times to see how it operated. No indications of any problems with the engine or tranny. Everything seemed to work just fine. Anybody got any ideas or hear of this before?

Thanks!