Ford bulletin 26E01
What it saysCertain 2023 - 2026 Model Year F-250 – F600 Super Duty Vehicles with 6.7L Engines Powertrain Control Module (PCM) Software Update The affected vehicles were originally manufactured with Powertrain Control Module (PCM)… NHTSA’s full summary ↓
Ford filed this with NHTSA as a manufacturer communication dated Mar 10, 2026, received Apr 7, 2026, about the electrical system. It names 20 model years (2023–2026). A manufacturer communication 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 communicationWhat it applies to, as NHTSA’s summary states it — build dates and equipment as the manufacturer filed them. The dealer checks the VIN and the build date on the door jamb; a vehicle outside the window is not covered by this bulletin.
Certain 2023 - 2026 Model Year F-250 – F600 Super Duty Vehicles with 6.7L Engines Powertrain Control Module (PCM) Software Update The affected vehicles were originally manufactured with Powertrain Control Module (PCM) software that did not provide the correct warnings when certain conditions are present in the Selective Catalyst Reduction (SCR) system as required and described in the Owner’s Manual.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 26E01 | Other | Mar 10, 2026 | 11030928 | PDF, 997 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 themAlso filed against model years this site has no page for: 2023 Ford F-550 SD; 2024 Ford F-550 SD; 2025 Ford F-550 SD; 2026 Ford F-550 SD; 2023 Ford F-600 SD; 2024 Ford F-600 SD; 2025 Ford F-600 SD; 2026 Ford F-600 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 12 model years this bulletin names have filed 237 complaints with NHTSA since 2015. 105 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 · ODI 11674055
Truck lost all electrical power while backing a trailer up. Engine died, no steering, no brakes, no power on dash, no emergence brakes, no power to door locks, no power to windows. If vehicle had been moving any faster no telling what could have been. Vehicle was towed to ford dealership and zero reasons for such a total loss of power.
2026 Ford F-250 Super Duty · Electrical System · filed with NHTSA Apr 6, 2026 · ODI 11729384
The trailer light control module is intermittently causing trailer light faults messages and signal failures. This is associated to recall 26C10. The software update doesn’t correct the problem. Ford does not have the hardware on hand to replace the failing part. This is a safety issue for us who are on the road towing travel trailers
2026 Ford F-350 Super Duty · Electrical System · filed with NHTSA Sep 16, 2026 · ODI 11764803
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 |
|---|---|---|---|
| TSB 26-2439 | Service bulletin | Oct 21, 2026 | Some of the vehicles listed in the Model statement above may exhibit the HVAC (heating, ventilation, and air conditioning) and radio system… |
| SSM 55255 | Service bulletin | Oct 15, 2026 | Some 2024-2026 F-Super Duty vehicles equipped with a 360-degree camera may exhibit a distorted or corrupted 360-degree camera image in the c… |
| TSB 26-2442 | Service bulletin | Oct 14, 2026 | This bulletin supersedes 26-2297. Reason for update: Add 2022-2025 Transit vehicles. Some of the vehicles listed in the model statement abov… |
| SSM 55239 | Service bulletin | Oct 12, 2026 | Some 2023-2026 F-Super Duty vehicles equipped with a trailer brake control module and built on or before 08-May-2026 may exhibit a "Trailer… |
| 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… |
| TCU-26.2.12.2.1 | Over-the-air update | Sep 17, 2026 | Quality improvements include: -Addresses a bug that may cause updates to fail |
| ECG-26.2.12.3 | Over-the-air update | Sep 16, 2026 | Quality improvements include: -ePrivacy enhancements |
| SSM 55118 | Service bulletin | Aug 25, 2026 | Some of the following vehicles: * 2023-2025 F-Super Duty built on or before 02-Feb-2025 * 2024-2026 Ranger/Bronco/Mustang * 2024-2025 F-15… |
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 26E01 a recall?
No. A manufacturer communication 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 26E01 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 26E01 cover?
The manufacturer filed it against 20 model years: 2026 Ford F-250 Super Duty, 2025 Ford F-250 Super Duty, 2024 Ford F-250 Super Duty, 2023 Ford F-250 Super Duty, 2026 Ford F-350 Super Duty, 2025 Ford F-350 Super Duty and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.