Toyota bulletin T-SB-0043-23 REV1
What it saysSome 2021 – 2022 model year Mirai vehicles may exhibit a MIL ON condition with one or both of the following Diagnostic Trouble Codes (DTCs) present: P1F6C71 – Air Sealing Valve Actuator Stuck P1F6E71 – Air Pressure… NHTSA’s full summary ↓
Toyota filed this with NHTSA as a service bulletin dated Feb 20, 2025, received Mar 11, 2025, about the engine — 2 documents under this number: T-SB-0043-23 Rev1 (2 filings). It names 2 model years (2021–2022). 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 communicationSome 2021 – 2022 model year Mirai vehicles may exhibit a MIL ON condition with one or both of the following Diagnostic Trouble Codes (DTCs) present: •P1F6C71 – Air Sealing Valve Actuator Stuck •P1F6E71 – Air Pressure Regulating Valve Actuator Stuck The EV control computer logic has been modified to reduce the possibility of this condition.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| T-SB-0043-23 Rev1 | Service bulletin | Feb 20, 2025 | 11016792 | |
| T-SB-0043-23 Rev1 | Service bulletin | Feb 20, 2025 | 11015506 |
What the document itself lists
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 89981-62110 | Computer, EV Control | — | eBay Motors → |
| 89981-62260 | Computer, EV Control | — | eBay Motors → |
| 89981-62120 | Computer, EV Control | — | eBay Motors → |
| 89981-62270 | Computer, EV Control | — | eBay Motors → |
| 89981-62150 | Computer, EV Control | — | eBay Motors → |
| 89981-62280 | Computer, EV Control | — | eBay Motors → |
| 89981-62160 | Computer, EV Control | — | eBay Motors → |
| 89981-62290 | Computer, EV Control | — | eBay Motors → |
| 89981-62170 | Computer, EV Control | — | eBay Motors → |
| 89981-62300 | Computer, EV Control | — | eBay Motors → |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| EL2304 | Reprogram the EV Control Computer | 0.5 hrs |
Read by machine from the document NHTSA serves (6 pages), read Sep 30, 2026. A part number is shown only where it matches Toyota’s own catalogue shape, an operation only with its code and time, and a description only where the reader got it whole; anything it could not settle is left out, and the PDF is the record. Times are the manufacturer’s warranty allowances, not a quote. Listings and prices on eBay Motors are the seller’s.
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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 2 model years this bulletin names have filed 11 complaints with NHTSA since 2015. 2 of them name 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.
The contact owns a 2022 Toyota Mirai. The contact stated that while driving at various speeds, the vehicle hesitated while the accelerator pedal was depressed and maintained automotive power. The "Parking Support Brake - PSKB" message was displayed.
2022 Toyota Mirai · Engine · filed with NHTSA Feb 27, 2026 · ODI 11720963
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 group9 other manufacturer communications filed against the Toyota Mirai under the same component group (engine), newest first. The eight newest are listed; the rest are on the Toyota list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| T-SB-0110-20 OBSOLETE | Service bulletin | Aug 20, 2026 | OBSOLETE NOTICE August 20, 2026: This bulletin is now obsolete. Please see T-SB-0051-26. |
| T-SB-0051-26 | Service bulletin | Aug 20, 2026 | This bulletin includes basic procedures for performing a rescue charge at battery on high voltage (HV) Ni-MH and Li-ion batteries. |
| 26TE03 | Warranty extension | May 7, 2026 | Although the Mirai Electric Heater Assemblies are covered by Toyota’s New Vehicle Limited Warranty for 3 years or 36,000 miles… |
| T-SB-0107-20 REV2 | Service bulletin | Feb 12, 2025 | OBSOLETE NOTICE February 11, 2025: This bulletin is now obsolete. Please see T-SB-0021-25. |
| T-SB-0021-25 | Service bulletin | Feb 10, 2025 | Flash reprogramming allows the Electronic Control Unit (ECU) software to be updated without replacing the ECU. Flash calibration updates for… |
| T-SB-0110-20 REV2 | Service bulletin | Dec 10, 2024 | This bulletin includes basic procedures for performing a rescue charge at battery on high voltage (HV) Ni-MH and Li-ion batteries. This bull… |
| T-SB-0120-20 | Service bulletin | Apr 15, 2024 | Some 2021 – 2024 model year Toyota vehicles may require the download and installation of vehicle specific software or configuration software… |
| T-PANT-2024-004- | Service bulletin | Mar 4, 2024 | This is to advise of various price adjustments that will affect Toyota Genuine Motor Oil and Long Life Coolant, effective March 1, 2024. The… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Toyota, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Toyota T-SB-0043-23 REV1 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 T-SB-0043-23 REV1 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. Every Toyota warranty extension on file lists the ones Toyota has filed.
Which vehicles does T-SB-0043-23 REV1 cover?
The manufacturer filed it against 2 model years: 2022 Toyota Mirai, 2021 Toyota Mirai. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.