2024 Rivian R1S — rough idle disappears just above idle speed

This is usually cheaper to test than to guess. Two 2024 Rivian R1Ss can feel identical and have different causes, so measure before you copy someone else's repair. That's the branch I'd chase this week. This is from a 2024 Rivian R1S in Boston with 35,500 miles. Post the numbers (or the code) and people can get more specific. Video is ugly but it shows the hesitation.

Intermittent stuff lies if you only catch it once. Move a coil or plug on the 2024 Rivian R1S if it's cylinder-specific and see whether the code follows. You'll know quickly if you're on the wrong tree. On “rough idle disappears just above idle speed,” that was the fork that mattered for me. This is from a 2024 Rivian R1S in Boston with 35,500 miles. Do that first. Climate here is different, so treat that as a local data point. Cold start is when I can actually reproduce it.

I wouldn't throw parts yet. A pressure test beats staring at a dry driveway if the 2024 Rivian R1S is losing coolant with no puddle. You'll know quickly if you're on the wrong tree. If they can't show the line item, I assume it's hiding. Worth doing even if the car feels fine right now. I'd rather look cautious in this thread than stuck later.

Start with the test that can prove you wrong. Loaded-suspension checks on the 2024 Rivian R1S catch play that a wheels-hanging inspection misses. That's the branch I'd chase this week. Run the total, not the monthly, before you commit. I've seen both outcomes, which is why I'd test instead of assume. I'm keeping receipts and dates in one folder.

Start with the test that can prove you wrong. Loaded-suspension checks on the 2024 Rivian R1S catch play that a wheels-hanging inspection misses. Save the big job until that test fails. Write the result down so the next test isn't a repeat of the last one. Wrote this up on my lunch break.

Cleared nothing. I want service to see the alert on the 2024 Rivian R1S first. No warning lights, which is why I'm documenting it.

Cleared nothing. I want service to see the alert on the 2024 Rivian R1S first. I'm keeping receipts and dates in one folder.

Ask what changed right before it started. Two 2024 Rivian R1Ss can feel identical and have different causes, so measure before you copy someone else's repair. That's the branch I'd chase this week. Verbal 'we'll take care of it' is not a plan. Cold start is when I can actually reproduce it.

Ask what changed right before it started. Move a coil or plug on the 2024 Rivian R1S if it's cylinder-specific and see whether the code follows. If the cheap test changes it, stop and reassess. If they can't show the line item, I assume it's hiding. A day of patience here is cheaper than a wrong part. I'll poke at it this weekend.

OP update: scanned the 2024 Rivian R1S again and still only have the one pending code, no new lights. I'd rather pay for diagnosis than a second guess-repair.

OP update: scanned the 2024 Rivian R1S again and still only have the one pending code, no new lights. No warning lights, which is why I'm documenting it.

I wouldn't throw parts yet. Swap the cheap/easy piece first on the 2024 Rivian R1S and see if the fault moves. Save the big job until that test fails. This is from a 2024 Rivian R1S in Boston with 35,500 miles. Do that first. Cold start is when I can actually reproduce it.

If it were in my driveway, get a real battery/charging test on the 2024 Rivian R1S, not just resting voltage, before blaming a module. Save the big job until that test fails. I'd want that in writing, not as a promise. No warning lights, which is why I'm documenting it.

It did rough idle disappears just above idle speed twice this week, both times after sitting. No change in mileage feel. Happens in gear, not in park, for what that's worth.