Now that I'm back in civilization, I stopped in at AutoZone to get the codes read since the next available appointment at the dealer is two weeks out. It's the gas cap codes (P04EC/P04EE; https://static.nhtsa.gov/odi/tsbs/2021/MC-10198356-9999.pdf). I reseated and cleaned the gas cap; we'll see if the light goes out. I'm just glad it's not something major!Well. Mine came on at 891 miles, and I’m out on an isolated island with no real access to anything.
I suspect it happened because I plugged in last night outside in the rain and maybe a little water got into the charge port. Or there was a brownout, which happens all the time out here. Anyway, when I unplugged the light in the charge port was red (though it was charging fine when I left it).
ETA I’ve had mine for 15 days at this point and all the RRTs were applied before I picked it up, so that’s not the fix. And yes I’ve checked the fuses. And the gas cap (even though it has been a week since I got fuel).
Apparently all the RRTs were NOT done when I picked up the vehicle, either -- 122 and 127 are still listed as outstanding. So I'll probably keep the appointment anyway.