Hi Joel,
I just saw your post because I'm getting the same OBD error code (p-1325) in my 2001 996TT with 54k miles. I took my car to a mechanic and they change both selenoids first but the error continues. After they went to pull down the motor and replace the camshaft adjustment & center o-ring but the error continues. At this point I think he's stock and have no idea what it can be. The deviation in the bank 1 is @ .80 and in the bank 2 is @ -3.52. The angle in bank 1 goes infinite but the angle in bank 2 doesn't go infinite numbers stay around +/-2. Can you give me some heads up to see what can be wrong and what to check? I will apprecitte your help with this issue. Regards.