Hi my p85 was working ok the HV battery had some issues and the total range of the car was 127miles not much of a problem where I live everything else was ok ,came home parked car plugged in 220v home charger 12 amp charge rate next day tried to use car no go door opend ok screen came to life ac came on when I put car in reverse everything shut down then rebooted with a list of fault codes ,tried reboot factory reboot charged 12 v battery left 12v off car overnight no joy will not go I am thinking the worst that I may have to drop the HV battery anybody any thoughts thank you