I think my ID4 realized I’m about to sell it and is now throwing a tantrum.
Posted May 31, 2022, 12:16 PM UTC
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I actually feared mine would do the same before I sold it two weeks ago. I was like “please don’t get an error, please don’t get an error” mostly because I didn’t want to screw up the very high trade in offer that the dealer was going to give me
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I was driving home from dropping my son off at daycare and it threw a bunch of errors: travel assist not working, TACC not working, electrical system malfunction, etc.
Not the first time it’s done this, but probably the first time in a good 8 months or so. Last time I took it to the dealership they said it was a software bug and it would go away next time I drove the car.
Low 12v battery? Infamous for throwing these kinds of errors in EVs
Oooh perhaps? I'm not sure why my 12V would be low considering the car gets driven plenty (and it's always plugged in). But maybe that's it?
Mine did exactly the same thing this winter, and the drive battery would also lose 3-5% overnight on a very cold night.
Turned out the 12V battery had two bad cells (making it an 8V battery!) and the drive battery was grinding itself down trying to keep it charged!
Three of the last five new cars I've bought have come with bad 12V batteries that needed to be replaced in the first year- a 2015 Subaru Impreza, a 2018 Honda HRV (that one went bad in a month and wouldn't start the car!) and our ID4.
My old EV would do this if I took only short trips, or left something on/plugged in, or didn't use it for a week. Of course you could also have a short, but I doubt that.
Be aware that you can't just jump start or charge batteries in the same way as the old days. Read the manual for 12v charging instructions. But you should be able to test the voltage on it easily enough. They really should have a voltage meter for the 12v in every EV.