Thanks for the suggestions. I had read the manual for the diagnostics on the code. I have checked and cleaned all the visible electrical connections. Although I have seen no corrosion, I applied an anti corrosion spray and cleaner. I have also checked all electrical connection for tightness. Right now it is working fine. I will wait and see what happens in the future. I am in the fourth year of having this E1 and except for the parking brake never working well, even though it has been in the shop for a repair, it has been a very reliable vehicle. I the idea of the EV, for I have owned an EV car and two hybrids, but I am concerned about how sensitive all the electronics are and the fact that there are few techs that can repair them. Fortunately I am both a retired auto tech and a retired IT so I do have a few insights into their workings.