Breakdowns & Roadside ProblemsQuestionCommunity Starter

2024 Rivian R1S — car died once at a light and restarted immediately

TowNerd232Community StarterNov 25, 20252024 Rivian R1S Dual-MotorWashington DC
The engine shut off at a stop once, restarted right away, and has been normal since. No warning stayed on. What data or checks would you prioritize before trusting it on a long trip? Mostly looking for the right next step.
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20 replies

QuietRoadie94Community StarterCommunity StarterNov 25, 2025permalink
I'd treat 12V warnings as a no-ignore. On the 2024 Rivian R1S, I'd get the 12V/DC-DC side checked even if the traction pack looks fine. Then you'll know the next fork. On “car died once at a light and,” that was the fork that mattered for me. Do that first. Climate here is different, so treat that as a local data point. No warning lights, which is why I'm documenting it.
CommuterDetailer973Community StarterCommunity StarterNov 25, 2025permalink
Don't clear the alert just to make the screen pretty. Leave the alerts on the 2024 Rivian R1S so service can see what you saw. Then you'll know the next fork. Do that first. I'd rather be boring and correct. I'd rather look cautious in this thread than stuck later.
TowNerd232Community StarterCommunity StarterNov 25, 2025permalink
It did car died once at a light and twice this week, both times after sitting. No change in mileage feel. Checking again after work.
CityLearner884Community StarterCommunity StarterNov 26, 2025permalink
I hear you, though I'd still want a second check. Leave the alerts on the 2024 Rivian R1S so service can see what you saw. I'd do that before spending real money. Have you gotten a second quote in writing? Parking it somewhere I can hear it better next time.
HybridHauler494Community StarterCommunity StarterNov 25, 2025permalink
Low-voltage gremlins will strand you even with a full pack. Try a second charger before blaming the 2024 Rivian R1S — site sharing and pack temp change the curve a lot. I'd do that before spending real money. Was this after sitting overnight? I've seen both outcomes, which is why I'd test instead of assume. Doing the boring step first on purpose.
QuietRoadie94Community StarterCommunity StarterNov 26, 2025permalink
I'd push back a little: Match starting SOC and battery temp if you're comparing 2024 Rivian R1S charge sessions. That's where I'd start. This is from a 2024 Rivian R1S in Washington DC. Stop there until you know. I keep a notes app thread for this now.
QuietRoadie94Community StarterCommunity StarterNov 25, 2025permalink
Charge curves lie if you don't match starting SOC and temp. Match starting SOC and battery temp if you're comparing 2024 Rivian R1S charge sessions. Then you'll know the next fork. That's the whole play. Wrote this up on my lunch break.
MarketBuyer159Community StarterCommunity StarterNov 25, 2025permalink
I'd treat 12V warnings as a no-ignore. On the 2024 Rivian R1S, 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 “car died once at a light and,” that was the fork that mattered for me. That's the whole play. This is the filter I use when the thread starts repeating itself. I keep a notes app thread for this now.
BoostMiles203Community StarterCommunity StarterNov 26, 2025permalink
Don't clear the alert just to make the screen pretty. Leave the alerts on the 2024 Rivian R1S so service can see what you saw. That's where I'd start. Take it or leave it — that's what I'd do. I'm keeping receipts and dates in one folder.
NewCarDetailer44Community StarterCommunity StarterNov 26, 2025permalink
Low-voltage gremlins will strand you even with a full pack. Try a second charger before blaming the 2024 Rivian R1S — site sharing and pack temp change the curve a lot. That's where I'd start. This is from a 2024 Rivian R1S in Washington DC. Stop there until you know. Next check is the cheap one I can do in a driveway.
ColdStartRoadie829Community StarterCommunity StarterNov 26, 2025permalink
Don't clear the alert just to make the screen pretty. Leave the alerts on the 2024 Rivian R1S so service can see what you saw. Then you'll know the next fork. If they can't show the line item, I assume it's hiding. Not trying to scare you — just skip the expensive first guess. Checking again after work.
HybridHauler494Community StarterCommunity StarterNov 26, 2025permalink
Low-voltage gremlins will strand you even with a full pack. Try a second charger before blaming the 2024 Rivian R1S — site sharing and pack temp change the curve a lot. Then you'll know the next fork. Have you gotten a second quote in writing? This is the version I'd tell a friend.
TorqueMechanicishCommunity StarterCommunity StarterNov 26, 2025permalink
Charge curves lie if you don't match starting SOC and temp. Match starting SOC and battery temp if you're comparing 2024 Rivian R1S charge sessions. I'd do that before spending real money. This is from a 2024 Rivian R1S in Washington DC. Run the total, not the monthly, before you commit. Checking again after work.
SunBeltNerdCommunity StarterCommunity StarterNov 27, 2025permalink
Agree — and I'd add this: Leave the alerts on the 2024 Rivian R1S so service can see what you saw. Then you'll know the next fork. Happy to compare notes if your setup is different. This is the version I'd tell a friend.
TowNerd232Community StarterCommunity StarterNov 26, 2025permalink
Checked the easy stuff on the 2024 Rivian R1S and found one clue worth chasing before I book a shop. I'll poke at it this weekend.
TowShopperCommunity StarterCommunity StarterNov 26, 2025permalink
Charge curves lie if you don't match starting SOC and temp. Match starting SOC and battery temp if you're comparing 2024 Rivian R1S charge sessions. I'd do that before spending real money. Write the result down so the next test isn't a repeat of the last one. I already checked the easy fluid levels.
CleanGal231Community StarterCommunity StarterNov 26, 2025permalink
Low-voltage gremlins will strand you even with a full pack. Try a second charger before blaming the 2024 Rivian R1S — 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. Not interested in a five-hour wait for a shrug.
RoadTripPilot788Community StarterCommunity StarterNov 26, 2025permalink
I'd treat 12V warnings as a no-ignore. On the 2024 Rivian R1S, I'd get the 12V/DC-DC side checked even if the traction pack looks fine. Then you'll know the next fork. On “car died once at a light and,” that was the fork that mattered for me. This is from a 2024 Rivian R1S in Washington DC. Learned this the expensive way on a previous car. Doing the boring step first on purpose.
BoostMiles203Community StarterCommunity StarterNov 27, 2025permalink
Don't clear the alert just to make the screen pretty. Leave the alerts on the 2024 Rivian R1S so service can see what you saw. I'd do that before spending real money. Take it or leave it — that's what I'd do. Parking it somewhere I can hear it better next time.
NewCarDetailer44Community StarterCommunity StarterNov 27, 2025permalink
Low-voltage gremlins will strand you even with a full pack. Try a second charger before blaming the 2024 Rivian R1S — site sharing and pack temp change the curve a lot. That's where I'd start. That's the whole play. Worth doing even if the car feels fine right now. This is me being the wet blanket on purpose.
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