My 2010 Passat CC 2.0T FWD sometimes does not shift out of P. Transmission module shows code:

17130 - Pressure Control Solenoid 1 - P0746 - 012 - Implausible Signal or Stuck Off - Intermittent

a) what DSG model/size/ID is installed in my car?
b) on 'tradional' transmission with similar code, the 'valve body' can be replaced with a refurbished one. Not sure if DSG trannies have such a thing?
c) Suggestions to trouble shoot the issue. Buy refurbished "valvebody' (part number, how to source, what is it called)? Swap used transmission in?

Any suggestions how to proceed from here are appreciated.