my brother has an srt4. 5 speed manual. autozone told him his transmission control module is bad. He goes to the dealer, the guy looks at him, rolls his eyes, and replies "your hand looks just fine to me"....and then explains there isn't a module for manual transmissions, since the operator IS the controller.

cooper30 has a pretty neat way to check codes too. 

The generic readers do not always provide the correct definition for the codes, and occasionally misread. This is more common in the palm  size readers that do nothing but display codes.

They also will not usually read chrysler specific codes that usually start with a P1_ _ _ . P1 is usually oem specific, while P0 is generic universal codes (although specific definitions vary)

I may be wrong but atleast at this Autozone I don't think there is opretunity for human error.  He went back inside after reading the code and pluged the reader inot his computer.  The computer printed out a reciept with the code descriptions.

Later I learned that on my car i can toggle the key between assec. and run 3 times and then the code will apear in the odometer screen.  Pretty nice.  Saves me the $100 of getting my own scanner!  Is this true on all late model chrysler vehicles?

I think a new gas cap has fixed the problem.