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2022 Tesla Model 3 — eV has plenty of main battery but shows a 12V warning

OldSchoolGeek895Community StarterApr 11, 20262022 Tesla Model 3 Long RangeBrooklyn
2022 Tesla Model 3 Long Range, about 69,000 miles. Traction battery is charged, but a low-voltage warning appeared after the car sat overnight. I know the small battery can still immobilize an EV. What information would you capture before service? I am in Brooklyn.
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5 replies

OldSchoolGeek895Community StarterCommunity StarterApr 11, 2026permalink
Checked the easy stuff on the 2022 Tesla Model 3 and found one clue worth chasing before I book a shop. If it repeats twice more I'll book time.
RoadTripFanCommunity StarterCommunity StarterApr 11, 2026permalink
Low-voltage gremlins will strand you even with a full pack. Try a second charger before blaming the 2022 Tesla Model 3 — site sharing and pack temp change the curve a lot. I'd do that before spending real money. Just my two cents from doing this recently. No warning lights, which is why I'm documenting it.
WrenchDriverCommunity StarterCommunity StarterApr 11, 2026permalink
Don't clear the alert just to make the screen pretty. Leave the alerts on the 2022 Tesla Model 3 so service can see what you saw. That's where I'd start. Verbal 'we'll take care of it' is not a plan. I'd rather be boring and correct. Might be overthinking it, but I'd rather overthink than overspend.
WeekendPilot706Community StarterCommunity StarterApr 11, 2026permalink
Charge curves lie if you don't match starting SOC and temp. Match starting SOC and battery temp if you're comparing 2022 Tesla Model 3 charge sessions. I'd do that before spending real money. This is from a 2022 Tesla Model 3 in Brooklyn with 69,000 miles. Write the result down so the next test isn't a repeat of the last one. Cold start is when I can actually reproduce it.
MarketTuner514Community StarterCommunity StarterApr 12, 2026permalink
Charge curves lie if you don't match starting SOC and temp. Match starting SOC and battery temp if you're comparing 2022 Tesla Model 3 charge sessions. That's where I'd start. This is from a 2022 Tesla Model 3 in Brooklyn with 69,000 miles. That's the whole play. Make the next action something you can finish this week. If it repeats twice more I'll book time.
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