2021 Lexus ES 350 — random misfire code but engine feels fine

If it were in my driveway, move a coil or plug on the 2021 Lexus ES if it's cylinder-specific and see whether the code follows. If the cheap test changes it, stop and reassess. If you share a photo of the worksheet, easier to sanity-check. I'd rather be boring and correct. If the story changes I'll post the new data.

Ask what changed right before it started. If a shop can't duplicate it on the 2021 Lexus ES, bring a video plus freeze-frame data, not just a story. That's the branch I'd chase this week. I'd want a dollar figure or a measured spec, not 'should be fine.' I keep a notes app thread for this now.

Intermittent stuff lies if you only catch it once. Get a real battery/charging test on the 2021 Lexus ES, not just resting voltage, before blaming a module. That's the branch I'd chase this week. On “random misfire code but engine feels fine,” that was the fork that mattered for me. Post the numbers (or the code) and people can get more specific. Checking again after work.

I wouldn't throw parts yet. Write temp, speed, and in-gear vs coast when the 2021 Lexus ES does it — then decide on parts. That's the branch I'd chase this week. That's the whole play. I keep a notes app thread for this now.

I'd want a measurement, not a hunch. Write temp, speed, and in-gear vs coast when the 2021 Lexus ES does it — then decide on parts. You'll know quickly if you're on the wrong tree. Do that first. Parking it somewhere I can hear it better next time.

This is usually cheaper to test than to guess. Write temp, speed, and in-gear vs coast when the 2021 Lexus ES does it — then decide on parts. You'll know quickly if you're on the wrong tree. If you share a photo of the worksheet, easier to sanity-check. That's coming from doing this as an owner, not a shop. I'd rather look cautious in this thread than stuck later.