2018 T650 with 650 hours. Been sitting a week, would not turn over yesterday. Got error message that seat bar sensor was out of range high, with light flashing. Tried again and it turned over and started, threw several codes, and it will move and steer, but the right joystick does nothing, no lift or tilt. went to shut it off to restart/ reboot, instruments went black but engine kept running. Turn back on and had to re-enter code to get instruments. Codes M2721, M6507. After several tries, engine shut off. It will start and run again, but same symptoms?