2023 Toyota 4Runner — dealer cannot reproduce an intermittent warning

Intermittent stuff lies if you only catch it once. Capture voltage while the 2023 Toyota 4Runner is actually failing — after it restarts you've lost the clue. You'll know quickly if you're on the wrong tree. On “dealer cannot reproduce an intermittent warning,” that was the fork that mattered for me. This is from a 2023 Toyota 4Runner in Houston. Not gospel, but it saved me a headache. Climate here is different, so treat that as a local data point. I'd rather pay for diagnosis than a second guess-repair.

I wouldn't throw parts yet. Swap the cheap/easy piece first on the 2023 Toyota 4Runner and see if the fault moves. Don't erase codes until someone who can help has seen them. Just my two cents from doing this recently. I'd rather pay for diagnosis than a second guess-repair.

I'd want a measurement, not a hunch. Write temp, speed, and in-gear vs coast when the 2023 Toyota 4Runner does it — then decide on parts. Don't erase codes until someone who can help has seen them. If you share a photo of the worksheet, easier to sanity-check. I already checked the easy fluid levels.

Log the conditions before you spend. A pressure test beats staring at a dry driveway if the 2023 Toyota 4Runner is losing coolant with no puddle. You'll know quickly if you're on the wrong tree. On “dealer cannot reproduce an intermittent warning,” that was the fork that mattered for me. Verbal 'we'll take care of it' is not a plan. Cold start is when I can actually reproduce it.

This is usually cheaper to test than to guess. A pressure test beats staring at a dry driveway if the 2023 Toyota 4Runner is losing coolant with no puddle. You'll know quickly if you're on the wrong tree. This is from a 2023 Toyota 4Runner in Houston. Just my two cents from doing this recently. Next check is the cheap one I can do in a driveway.

Start with the test that can prove you wrong. A pressure test beats staring at a dry driveway if the 2023 Toyota 4Runner is losing coolant with no puddle. If the cheap test changes it, stop and reassess. This is from a 2023 Toyota 4Runner in Houston. If you share a photo of the worksheet, easier to sanity-check. Not driving it hard until I know more.