Ford over-the-air update TCU-26.2.12.2.1
What it saysQuality improvements include: -Addresses a bug that may cause updates to fail NHTSA’s full summary ↓
Ford filed this with NHTSA as an over-the-air update dated Sep 17, 2026, received Sep 21, 2026, about the electrical system. It names 22 model years (2023–2026). 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: -Addresses a bug that may cause updates to fail
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| TCU-26.2.12.2.1 | Over-the-air update | Sep 17, 2026 | 11037418 | not found |
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.
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 18 model years this bulletin names have filed 442 complaints with NHTSA since 2015. 126 of them name Electrical System — 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.
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
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
Dash completely turned off. We could not see speed, gear, battery life, etc. See attached photo of the dash board above the steering wheel. Tried turning car off and on, tried resetting the monitor. Dealership service advisor witnessed this. The technician could not replicate it, and they did not have a solution but it is now back on.
2025 Ford Mustang Mach-E · Electrical System · filed with NHTSA Dec 20, 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 group326 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 55215 | Service bulletin | Sep 30, 2026 | Some 2022-2024 Maverick hybrid vehicles may exhibit various electrical symptoms and/or a no crank/no start condition related to an intermitt… |
| 25E10-S1 | Emissions | Sep 30, 2026 | NEW VEHICLE DELIVERY HOLD - Emissions Recall 25E10 - Supplement #1 Certain 2018-2020 Model Year F-150 Vehicles With 3.3L Engines and 2016-20… |
| 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-26.2.11.5 | Over-the-air update | Sep 24, 2026 | Quality improvements include: -Addresses key off load battery usage caused by the Telematics Control Unit's Wi-Fi not powering down properly… |
| 26B07 | Other | Sep 24, 2026 | Recommended Repair Prior to Sale Customer Satisfaction Program 26B07 Certain 2021-2025 Model Year F-150 Lightning and Mustang Mach-E Vehicle… |
| SSM 55194 | Service bulletin | Sep 23, 2026 | Some 2021-2024 Mustang Mach-E, 2025-2026 Navigator and 2024 F-150 vehicles may exhibit inoperative welcome/approach detection lights. This m… |
| TSB 26-2421 | Service bulletin | Sep 18, 2026 | This bulletin updates 25-2622. Reason for update: * Update the Service Procedure to: - Remove Step related connecting a battery charger - Ad… |
| SYNC-26.2.8.5 | Over-the-air update | Sep 18, 2026 | 26C37 Recall remedy Prevents a potential rearview camera image obstruction caused by a menu displaying on top of it |
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 TCU-26.2.12.2.1 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 TCU-26.2.12.2.1 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 TCU-26.2.12.2.1 cover?
The manufacturer filed it against 22 model years: 2026 Ford F-150, 2025 Ford F-150, 2026 Ford F-250 Super Duty, 2025 Ford F-250 Super Duty, 2024 Ford F-250 Super Duty, 2023 Ford F-250 Super Duty and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.