How to add afterpay card to apple walletTransmission Controller Diagnostic Trouble Codes And Calibration Codes. If you want to repair your John Deere machinies, you are needing all this information, it is an valious information. READ IT. Transmission controller diagnostic trouble codes will display when malfunction occurs. NOTE:Syjfl.phpjfouzcCommon John Deere transmission issues can vary by model, but a typical issue is the machine not moving with the engine running. One cause of this issue is the transmission oil being low. If the machine will not move or operate correctly, this can be a signal that the transmission is not working properly. If the transmission oil is too cold, it ...