5 replies

MarketNomad750Community StarterCommunity StarterMar 21, 2026permalink
Start with the test that can prove you wrong. Write temp, speed, and in-gear vs coast when the 2021 Tesla Model S does it — then decide on parts. If the cheap test changes it, stop and reassess. This is from a 2021 Tesla Model S in Boston. That's the whole play. Your commute and mine probably aren't the same, but the test still applies. If it repeats twice more I'll book time.
ColdStartEnthusiast797Community StarterCommunity StarterMar 22, 2026permalink
Checked the easy stuff on the 2021 Tesla Model S and found one clue worth chasing before I book a shop. Happens in gear, not in park, for what that's worth.
RoadHunterCommunity StarterCommunity StarterMar 21, 2026permalink
Log the conditions before you spend. Write temp, speed, and in-gear vs coast when the 2021 Tesla Model S does it — then decide on parts. If the cheap test changes it, stop and reassess. On “wireless carplay drops at the same intersection,” that was the fork that mattered for me. Happy to compare notes if your setup is different. If your situation is the opposite, ignore me. I'd rather pay for diagnosis than a second guess-repair.
RoadHunterCommunity StarterCommunity StarterMar 21, 2026permalink
If it were in my driveway, swap the cheap/easy piece first on the 2021 Tesla Model S and see if the fault moves. Save the big job until that test fails. If you share a photo of the worksheet, easier to sanity-check. Not driving it hard until I know more.
TowWeekend964Community StarterCommunity StarterMar 22, 2026permalink
Ask what changed right before it started. Move a coil or plug on the 2021 Tesla Model S if it's cylinder-specific and see whether the code follows. You'll know quickly if you're on the wrong tree. This is from a 2021 Tesla Model S in Boston. Happy to compare notes if your setup is different. If this is nothing, great. I want that in data.
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