EV OwnershipQuestionCommunity Starter

Low-voltage battery warning after software update

JDMTuner26Community StarterJan 14, 20262023 Rivian R1T Quad-MotorPennsylvania
A software update finished overnight and this morning I got a low-voltage battery warning. Main battery is charged. Before scheduling service, is there anything safe to check in the app/service menu? Any data points from owners would help.
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15 replies

ApexGal99Community StarterCommunity StarterJan 14, 2026permalink
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. That's where I'd start. Had a similar mess a couple years ago and that's what finally sorted it. That's my plan before I call anyone.
CleanPilot15Community StarterCommunity StarterJan 14, 2026permalink
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. That's where I'd start. Monthly payment math is how wallets disappear. I keep a notes app thread for this now.
ApexGal99Community StarterCommunity StarterJan 14, 2026permalink
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. That's where I'd start. Learned this the expensive way on a previous car. That's my plan before I call anyone.
JDMTuner26Community StarterCommunity StarterJan 14, 2026permalink
Cleared nothing. I want service to see the alert on the 2023 Rivian R1T first. Happens in gear, not in park, for what that's worth.
BoxerScout6Community StarterCommunity StarterJan 14, 2026permalink
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. That's where I'd start. Monthly payment math is how wallets disappear. Not interested in a five-hour wait for a shrug.
BoxerScout6Community StarterCommunity StarterJan 14, 2026permalink
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. The universe charges extra for guessing. This is me being the wet blanket on purpose.
NewCarGuy10Community StarterCommunity StarterJan 14, 2026permalink
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. I'd do that before spending real money. On “voltage battery warning after software update,” that was the fork that mattered for me. This is from a 2023 Rivian R1T in Pennsylvania. Did the worksheet show tax yet? If your situation is the opposite, ignore me. If it repeats twice more I'll book time.
NewCarGuy10Community StarterCommunity StarterJan 15, 2026permalink
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? Doing the boring step first on purpose.
QuietSeller41Community StarterCommunity StarterJan 15, 2026permalink
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. That's the whole play. Not driving it hard until I know more.
SmoothWrench66Community StarterCommunity StarterJan 15, 2026permalink
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. Happy to compare notes if your setup is different. Wrote this up on my lunch break.
ApexGal99Community StarterCommunity StarterJan 15, 2026permalink
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. A shop burned me once by skipping that step. This is the version I'd tell a friend.
QuietSeller41Community StarterCommunity StarterJan 15, 2026permalink
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. Stop there until you know. Might be overthinking it, but I'd rather overthink than overspend.
SmoothWrench66Community StarterCommunity StarterJan 15, 2026permalink
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. I'd do that before spending real money. On “voltage battery warning after software update,” that was the fork that mattered for me. Post the numbers (or the code) and people can get more specific. This is the filter I use when the thread starts repeating itself. Wrote this up on my lunch break.
CleanPilot15Community StarterCommunity StarterJan 15, 2026permalink
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 “voltage battery warning after software update,” that was the fork that mattered for me. The universe charges extra for guessing. If your situation is the opposite, ignore me. Doing the boring step first on purpose.
SmoothWrench66Community StarterCommunity StarterJan 15, 2026permalink
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. I'd do that before spending real money. If you share a photo of the worksheet, easier to sanity-check. I've seen both outcomes, which is why I'd test instead of assume. Might be overthinking it, but I'd rather overthink than overspend.
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