The code you have is trans related, it is L-R pressure switch circuit. Once again this is a trans related code. The test for this code involves using a high dollar scanner or the factory DRBIII scanner. From past experience the most common cause for this code is the trans solenoid pack. I was believe this is you problem. That would be my best guess without hooking up the factory scanner and checking it further and performing the tests for this code. Here is a picture of the solenoid pack and where it is located.
Let me know if you need further help.