What I am about to say may not be the problem. How old is the battery? Check the battery voltage. It should be a min of 11.5 V when engine is off and around 14 V when running. Just trying to rule out low voltage causing the ECU/BCU going crazy. I noticed that your transmission gear selector readout has gone crazy too. If you are not confidant about doing checks yourself, go to the 3S dealer and have it scanned