Did you find a resolution to the power system error as I am facing the same issue in my fit hybrid. According to the scanner code it is an electrical isolation issue. Apparently, the high voltage cables beneath the car were damaged (maybe hit a speed breaker, though not sure). Anyways the cables were repaired and placed back. Now the car is running fine, transfer to EV and AC is all good but the error code is persisting. The mechanic says the car has no other issues. Still worried Any recommendations?