Ford over-the-air update PT-25.24.4
What it saysQuality improvements include: -On-Board Diagnostics calibration for an enhanced Intake air temperature sensor performance NHTSA’s full summary ↓
Ford filed this with NHTSA as an over-the-air update dated Sep 18, 2025, received Oct 3, 2025, about the engine — 1 document under this number: PT-25.24.4 F-150. It names 1 model year (2021). An over-the-air update is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationQuality improvements include: -On-Board Diagnostics calibration for an enhanced Intake air temperature sensor performance
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PT-25.24.4 F-150 | Over-the-air update | Sep 18, 2025 | 11023723 | PDF, 11 KB |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 1 model year this bulletin names have filed 1,309 complaints with NHTSA since 2015. 584 of them name Power Train, Engine — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
On the 2021 Ford F-150, the 88 owners who gave an odometer reading for Power Train reported it at a median of 58,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
The Check Engine Light illuminated and brought to Ford dealer. Was advised it has code P237C which is a failed Exhaust Heat Exchanger, dealer ordered part # ML3Z5A212W. There is no coolant leak visible from the failed part.
2021 Ford F-150 · Power Train · filed with NHTSA May 3, 2022 · ODI 11463289
In depth: 2021 Ford F-150 transmission and drivetrain problems → · 2021 Ford F-150 engine problems →
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the engine
Source: same model, same component group60 other manufacturer communications filed against the Ford F-150 under the same component group (engine), newest first. The eight newest are listed; the rest are on the Ford list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SSM 55228 | Service bulletin | Oct 8, 2026 | Some 2020-2026 Aviator/Explorer/F-150/Bronco/Ranger vehicles equipped with a 2.7L or 3.0L (non-diesel) engine may need the front engine cove… |
| 25L05 | Other | Sep 2, 2026 | Certain 2024-2025 Model Year F-150 Vehicles Equipped with 2.7L Engine Vehicle Emission Control Information (VECI) Label Update |
| 25M01 | Other | Jul 28, 2026 | Customer Satisfaction Program 25M01 Certain 2021 Model Year F-150 3.0L Diesel Engine and 2020-2022 Model Year Super Duty with 6.7L Diesel En… |
| TSB 26-2233 | Service bulletin | May 14, 2026 | This article supersedes TSB 26-2116 to clarify the prior approval statement. Some of the vehicles listed in the model statement above may ex… |
| SSM 54795 | Service bulletin | May 4, 2026 | Some 2021-2023 F-150 vehicles equipped with a 3.5L PowerBoost engine and 2020-2026 Explorer vehicles equipped with a 3.3L hybrid engine may… |
| TSB 26-2116 | Service bulletin | Apr 9, 2026 | This article supersedes TSB 25-2323 to update the Service procedure, Parts list, and add a clarification note about Cost Cap and Prior appro… |
| 24N12 S2 | Other | Mar 31, 2026 | Certain 2021 - 2022 Model Year Various Vehicles Engine Valve Inspection Test This submission includes : Technical Instructions Updated word… |
| SSM 54678 | Service bulletin | Mar 20, 2026 | Some 2021-2026 F-150 vehicles equipped with a 5.0L/5.2L engine, 2021-2025 F-Super Duty/F-53 Motorhome/F59 Commercial Stripped Chassis vehicl… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Ford, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Ford PT-25.24.4 a recall?
No. A over-the-air update is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the PT-25.24.4 repair free?
A over-the-air update is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does PT-25.24.4 cover?
The manufacturer filed it against 1 model year: 2021 Ford F-150. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.