Cooling SystemQuestionCommunity Starter

2023 Ford Bronco — temperature climbs in traffic but drops once moving

WrenchPilot142Community StarterMay 28, 20262023 Ford Bronco BadlandsOrange County
Coolant temperature rises while sitting with the A/C on, then drops once the car is moving. Coolant level looks correct. Fans run, but I do not know whether they are reaching full commanded speed.
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23 replies

CommuterFan220Community StarterCommunity StarterMay 28, 2026permalink
I wouldn't throw parts yet. Move a coil or plug on the 2023 Ford Bronco if it's cylinder-specific and see whether the code follows. That's the branch I'd chase this week. I'd want that in writing, not as a promise. Your commute and mine probably aren't the same, but the test still applies. If it repeats twice more I'll book time.
WeekendGuy384Community StarterCommunity StarterMay 29, 2026permalink
Yes, with one caveat: Write temp, speed, and in-gear vs coast when the 2023 Ford Bronco does it — then decide on parts. Don't erase codes until someone who can help has seen them. On “temperature climbs in traffic but drops once,” that was the fork that mattered for me. That's the sequence I'd use. Climate here is different, so treat that as a local data point. Not driving it hard until I know more.
EVHauler534Community StarterCommunity StarterMay 28, 2026permalink
I wouldn't throw parts yet. If a shop can't duplicate it on the 2023 Ford Bronco, bring a video plus freeze-frame data, not just a story. You'll know quickly if you're on the wrong tree. Run the total, not the monthly, before you commit. I've seen both outcomes, which is why I'd test instead of assume. Heat soak after errands is the other window.
EVHauler534Community StarterCommunity StarterMay 29, 2026permalink
Not convinced that's the whole story. If a shop can't duplicate it on the 2023 Ford Bronco, bring a video plus freeze-frame data, not just a story. If the cheap test changes it, stop and reassess. I'd want a dollar figure or a measured spec, not 'should be fine.' A day of patience here is cheaper than a wrong part. If that fails I'll eat the diagnostic fee.
WeekendRoadie414Community StarterCommunity StarterMay 28, 2026permalink
Intermittent stuff lies if you only catch it once. Move a coil or plug on the 2023 Ford Bronco if it's cylinder-specific and see whether the code follows. You'll know quickly if you're on the wrong tree. On “temperature climbs in traffic but drops once,” that was the fork that mattered for me. Verbal 'we'll take care of it' is not a plan. Climate here is different, so treat that as a local data point. This is the version I'd tell a friend.
WeekendGuy384Community StarterCommunity StarterMay 28, 2026permalink
I'd want a measurement, not a hunch. Capture voltage while the 2023 Ford Bronco is actually failing — after it restarts you've lost the clue. That's the branch I'd chase this week. That's the sequence I'd use. I'd rather be boring and correct. Parking it somewhere I can hear it better next time.
WrenchPilot142Community StarterCommunity StarterMay 28, 2026permalink
I went back under the 2023 Ford Bronco and it only happens after a heat soak, not on a cold start. This is me being the wet blanket on purpose.
NoMarkupEnthusiast497Community StarterCommunity StarterMay 28, 2026permalink
I'd want a measurement, not a hunch. If a shop can't duplicate it on the 2023 Ford Bronco, bring a video plus freeze-frame data, not just a story. If the cheap test changes it, stop and reassess. This is from a 2023 Ford Bronco in Orange County. Time, temperature, and whether it's in gear are the notes that actually help a shop. Video is ugly but it shows the hesitation.
SunBeltOwnerCommunity StarterCommunity StarterMay 29, 2026permalink
Yes, with one caveat: Loaded-suspension checks on the 2023 Ford Bronco catch play that a wheels-hanging inspection misses. Save the big job until that test fails. Did the worksheet show tax yet? I'd rather be boring and correct. Video is ugly but it shows the hesitation.
EVDaily29Community StarterCommunity StarterMay 30, 2026permalink
Not convinced that's the whole story. If a shop can't duplicate it on the 2023 Ford Bronco, bring a video plus freeze-frame data, not just a story. Save the big job until that test fails. Was this after sitting overnight? I'll update if anything new shows up.
WeekendNomad775Community StarterCommunity StarterMay 31, 2026permalink
Agree — and I'd add this: Move a coil or plug on the 2023 Ford Bronco if it's cylinder-specific and see whether the code follows. Save the big job until that test fails. On “temperature climbs in traffic but drops once,” that was the fork that mattered for me. This is from a 2023 Ford Bronco in Orange County. Not gospel, but it saved me a headache. If it repeats twice more I'll book time.
ApexTunerCommunity StarterCommunity StarterMay 28, 2026permalink
Log the conditions before you spend. Capture voltage while the 2023 Ford Bronco is actually failing — after it restarts you've lost the clue. That's the branch I'd chase this week. On “temperature climbs in traffic but drops once,” that was the fork that mattered for me. If you share a photo of the worksheet, easier to sanity-check. Checking again after work.
CommuterFan220Community StarterCommunity StarterMay 29, 2026permalink
Start with the test that can prove you wrong. A pressure test beats staring at a dry driveway if the 2023 Ford Bronco is losing coolant with no puddle. That's the branch I'd chase this week. I'd want that in writing, not as a promise. Your commute and mine probably aren't the same, but the test still applies. If that fails I'll eat the diagnostic fee.
OldSchoolGeek895Community StarterCommunity StarterMay 29, 2026permalink
Log the conditions before you spend. A pressure test beats staring at a dry driveway if the 2023 Ford Bronco is losing coolant with no puddle. Save the big job until that test fails. On “temperature climbs in traffic but drops once,” that was the fork that mattered for me. This is from a 2023 Ford Bronco in Orange County. Write the result down so the next test isn't a repeat of the last one. Happens in gear, not in park, for what that's worth.
WrenchPilot142Community StarterCommunity StarterMay 29, 2026permalink
Cleared nothing. I want service to see the alert on the 2023 Ford Bronco first. Next check is the cheap one I can do in a driveway.
WrenchPilot142Community StarterCommunity StarterMay 29, 2026permalink
Checked the easy stuff on the 2023 Ford Bronco and found one clue worth chasing before I book a shop. Checking again after work.
CommuterFan220Community StarterCommunity StarterMay 29, 2026permalink
Start with the test that can prove you wrong. Capture voltage while the 2023 Ford Bronco is actually failing — after it restarts you've lost the clue. That's the branch I'd chase this week. Verbal 'we'll take care of it' is not a plan. Doing the boring step first on purpose.
WeekendRoadie414Community StarterCommunity StarterMay 29, 2026permalink
Ask what changed right before it started. Swap the cheap/easy piece first on the 2023 Ford Bronco and see if the fault moves. Don't erase codes until someone who can help has seen them. 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 keep a notes app thread for this now.
ApexTunerCommunity StarterCommunity StarterMay 29, 2026permalink
Start with the test that can prove you wrong. If a shop can't duplicate it on the 2023 Ford Bronco, bring a video plus freeze-frame data, not just a story. That's the branch I'd chase this week. This is from a 2023 Ford Bronco in Orange County. Post the numbers (or the code) and people can get more specific. Your commute and mine probably aren't the same, but the test still applies. I keep a notes app thread for this now.
EVHauler534Community StarterCommunity StarterMay 29, 2026permalink
If it were in my driveway, two 2023 Ford Broncos can feel identical and have different causes, so measure before you copy someone else's repair. You'll know quickly if you're on the wrong tree. This is from a 2023 Ford Bronco in Orange County. I'd want a dollar figure or a measured spec, not 'should be fine.' Not trying to scare you — just skip the expensive first guess. If that fails I'll eat the diagnostic fee.
WeekendRoadie414Community StarterCommunity StarterMay 29, 2026permalink
I'd want a measurement, not a hunch. Two 2023 Ford Broncos can feel identical and have different causes, so measure before you copy someone else's repair. You'll know quickly if you're on the wrong tree. Verbal 'we'll take care of it' is not a plan. Happens in gear, not in park, for what that's worth.
WrenchPilot142Community StarterCommunity StarterMay 29, 2026permalink
Tried a second charger / second scan and the story on the 2023 Ford Bronco didn't change. I'm in no rush to be a hero on it.
EVHauler534Community StarterCommunity StarterMay 29, 2026permalink
Ask what changed right before it started. A pressure test beats staring at a dry driveway if the 2023 Ford Bronco is losing coolant with no puddle. If the cheap test changes it, stop and reassess. If it doesn't change the out-the-door or the repair estimate, it's noise. If this is nothing, great. I want that in data.
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