I have a 2003 Audi A4 1.8T FWD with a CVT transmission with flashing PRND. I just had the TCM repaired and after re installing it the car is still flashing. The error code I get is 18221 P1813 pressure control solenoid 1 (N215) electrical. Resistance too high. I switched the solenoid out and have the same error. Can anyone tell me if this is the TCM still acting up, the trans fluid/fluid/pump, or where the solenoids are located? I can't seem to find anything that explains a fix or what causes the fault code. Ross Tech wiki doesn't list it. If anyone can help me with this I would greatly appreciate it.

Thanks,
Brian