Ford bulletin TSB 24-2066
What it saysThis TSB supersedes article 24-2036 to update the vehicles affected. NHTSA’s full summary ↓
Ford filed this with NHTSA as a service bulletin dated Mar 12, 2024, received Apr 3, 2024, about the electrical system. It names 14 model years (2023–2024). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis TSB supersedes article 24-2036 to update the vehicles affected. Some 2023-2024 F-Super Duty pickup vehicles built on or before 02-Jan-2024 equipped with a 6.7L engine may exhibit an illuminated MIL with diagnostic trouble codes (DTC) P0133, P0139, and/or P0145 stored in the powertrain control module (PCM). This may be due to the software in the PCM and does not affect vehicle operation.
Trouble codes it names: P0133 P0139 P0145
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| TSB 24-2066 | Service bulletin | Mar 12, 2024 | 10252546 | PDF, 64 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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
Find the control module (tcm/pcm/tecm) for the 2024 F-250 Super Duty →Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
Model years it names
Source: as the manufacturer filed themAlso filed against model years this site has no page for: 2023 Ford F-550 SD; 2024 Ford F-550 SD; 2023 Ford F-600 SD; 2024 Ford F-600 SD; 2024 Ford F-650 Incomplete Chassis; 2023 Ford F-650 SD; 2023 Ford F-750 SD; 2024 Ford F-750 SD.
A 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 6 model years this bulletin names have filed 179 complaints with NHTSA since 2015. 79 of them name Electrical System, Power Train — 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.
The contact owns a 2024 Ford F-350. The contact stated that while driving at an undisclosed speed, the transmission unexpectedly downshifted. There was no warning light illuminated. The vehicle was taken to the dealer but was not diagnosed or repaired. The dealer informed the contact that a software update had been completed on the TCM.
2024 Ford F-350 Super Duty · Power Train · filed with NHTSA Jul 16, 2025
Multiple electrical issues related to dashboard controls, video sensors, head unit. Controls powering down while driving, sensors throwing multiple error messages. All since 1,500 miles. Ford could not figure out what the issue was so they replaced the wiring harness. After 2 months in the shop I got my vehicle back.
2023 Ford F-350 Super Duty · Electrical System · filed with NHTSA Mar 11, 2025
The contact owns a 2024 Ford F-350 SD. The contact stated that while driving at various speeds and hauling a trailer, the trailer brakes failed to activate while depressing the brake pedal. During the failure, there were no warning lights or messages displayed. The cause of the failure was not yet determined.
2024 Ford F-350 Super Duty · Electrical System · filed with NHTSA Jun 16, 2025
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 electrical system
Source: same model, same component group100 other manufacturer communications filed against these Ford models under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Ford list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| SSM 55208 | Service bulletin | Sep 25, 2026 | Some 2024-2026 F-150, 2025 Explorer/Aviator, 2025-2026 Expedition/Navigator, or 2026 F-Super Duty vehicles may exhibit diagnostic trouble co… |
| ECG-26.2.12.3 | Over-the-air update | Sep 16, 2026 | Quality improvements include: -ePrivacy enhancements |
| SSM 55116 | Service bulletin | Aug 25, 2026 | Some of the following vehicles: * 2025-2026 Expedition/Navigator built on or after 02-Feb-2025 * 2025-2026 F-Super Duty built on or after 0… |
| SSM 55031 | Service bulletin | Jul 23, 2026 | Some 2021-2026 Ford/Lincoln vehicles may exhibit various symptoms including but not limited to the auto start/stop system not operating as i… |
| SSM 55021 | Service bulletin | Jul 20, 2026 | Some 2025-2026 Bronco/Bronco Sport/Corsair/F-150/F-Super Duty/Maverick/Mustang/Mustang Mach-E/Ranger vehicles may exhibit a no audio/sound c… |
| SSM 54976 | Service bulletin | Jul 1, 2026 | Some 2023-2026 F-53 Motorhome Chassis/F-59 Commercial Stripped Chassis and 2024-2026 F-650/F-750/E-Series vehicles equipped with a 6R140 tra… |
| SSM 54975 | Service bulletin | Jul 1, 2026 | Some 2023-2026 F-Super Duty vehicles equipped with a 10R100 or 10R140 transmission may exhibit an intermittent failure to engage forward or… |
| TSB 26-2297 | Service bulletin | Jun 24, 2026 | Some of the vehicles listed in the model statement above equipped with SYNC4 may experience a blank center display screen or black center di… |
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 TSB 24-2066 a recall?
No. A service bulletin 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 TSB 24-2066 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does TSB 24-2066 cover?
The manufacturer filed it against 14 model years: 2024 Ford F-250 Super Duty, 2023 Ford F-250 Super Duty, 2024 Ford F-350 Super Duty, 2023 Ford F-350 Super Duty, 2024 Ford F-450 Super Duty, 2023 Ford F-450 Super Duty and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.