Can someone help me out here?

0504

Diagnostic Trouble Code 0504 points to a problem with the Automatic Transmission Communications line. Pulse signals are exchanged between the Engine Control Module and the Transmission Control Module to assure smooth shifting during hard acceleration or deceleration.

This malfunction is detected when the ECM continuously receives an incorrect voltage from the TCM. Possible causes include...
- Harness or connectors (The communications line circuit between the ECM and the TCM is open or shorted.)
- TCM
- Discharged or faulty battery

 

I would check your dropping resistor I got the same code and that's what mine was. It's located on the driver side between air box and strut tower. It is $40 from the dealer.

 

same problem 0504 is it bad how can i check what can it be?

 

Is your car shifting real firm. What driveability problems are you having.

 

Maybe this will help (check trouble diagnostics code P0600)

http://members.dslextreme.com/users/...esm/a32-ec.pdf