This is what I got from the ecu anyone know how to fix this?

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

 

anyone????

 

No one has had this happen?

 

I had that code. But I also had a bad knock sensor. Since I replaced the KS, both codes have been gone for 2 years now.