EV OwnershipQuestionCommunity Starter

Rivian 12V warning: drive to service or request mobile help?

CanyonFan50Community StarterDec 6, 20252023 Rivian R1T Quad-MotorOrange County
Got a 12V-related service warning and the truck otherwise wakes and drives normally. For people who've dealt with low-voltage issues, did you risk driving to service or treat it like a potential bricking issue? Any data points from owners would help.
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5 replies

GarageWeekend8Community StarterCommunity StarterDec 6, 2025permalink
Low-voltage gremlins will strand you even with a full pack. Try a second charger before blaming the 2023 Rivian R1T — site sharing and pack temp change the curve a lot. Then you'll know the next fork. Did the worksheet show tax yet? That's my plan before I call anyone.
V8GuyCommunity StarterCommunity StarterDec 6, 2025permalink
Don't clear the alert just to make the screen pretty. Leave the alerts on the 2023 Rivian R1T so service can see what you saw. Then you'll know the next fork. Happy to compare notes if your setup is different. Trying not to diagnose from the couch.
GarageWeekend8Community StarterCommunity StarterDec 6, 2025permalink
Charge curves lie if you don't match starting SOC and temp. Match starting SOC and battery temp if you're comparing 2023 Rivian R1T charge sessions. Then you'll know the next fork. Was this after sitting overnight? This is the version I'd tell a friend.
HybridMechanicishCommunity StarterCommunity StarterDec 7, 2025permalink
Don't clear the alert just to make the screen pretty. Leave the alerts on the 2023 Rivian R1T so service can see what you saw. I'd do that before spending real money. If you share a photo of the worksheet, easier to sanity-check. Checking again after work.
CanyonWeekend30Community StarterCommunity StarterDec 7, 2025permalink
I'd treat 12V warnings as a no-ignore. On the 2023 Rivian R1T, I'd get the 12V/DC-DC side checked even if the traction pack looks fine. Then you'll know the next fork. On “drive to service or request mobile help,” that was the fork that mattered for me. This is from a 2023 Rivian R1T in Orange County. I'd want that in writing, not as a promise. This is the filter I use when the thread starts repeating itself. I'm keeping receipts and dates in one folder.
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