Toyota bulletin T-SB-0056-24
What it saysSome 2023 – 2024 model year Crown and 2024 model year Grand Highlander Hybrid vehicles equipped with the PC60 hybrid transmission may exhibit a MIL ON condition with Diagnostic Trouble Code (DTC) P279762… NHTSA’s full summary ↓
Toyota filed this with NHTSA as a service bulletin dated Jun 25, 2024, received Jul 23, 2024, about the power train — 2 documents under this number. It names 3 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 communicationSome 2023 – 2024 model year Crown and 2024 model year Grand Highlander Hybrid vehicles equipped with the PC60 hybrid transmission may exhibit a MIL ON condition with Diagnostic Trouble Code (DTC) P279762 (Electromagnetic Oil Pump Component Internal Failure) present. The Transmission Control Module (TCM) 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-0056-24 | Service bulletin | Jun 25, 2024 | 11005124 | |
| T-SB-0056-24 | Service bulletin | Jun 25, 2024 | 11005066 |
What the document itself lists
Part the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 89530-48540 | Grand Highlander HV | — | eBay Motors → |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| TC2403 | Transmission Control Module Reprogramming | 0.5 hrs |
Read by machine from the document NHTSA serves (5 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 3 model years this bulletin names have filed 286 complaints with NHTSA since 2015. 61 of them name 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 Toyota Grand Highlander Hybrid. The contact stated that while driving at approximately 35-45 MPH, the vehicle experienced a loss of motive power while shifting gear. There were no warning lights illuminated. The contact stated that the failure was related to a software update issue.
2024 Toyota Grand Highlander · Power Train · filed with NHTSA Jun 13, 2024 · ODI 11594294
Our 2024 Toyota Crown Platinum has been experiencing random loss of power or torque when merging into traffic from a complete stop. The vehicle will be working fine; then, while attempting to accelerate from a complete stop, there is no torque or ability to accelerate up to posted speed.
2024 Toyota Crown · Power Train · filed with NHTSA Jun 14, 2026 · ODI 11743981
When driving the vehicle under normal load and conditions, after coming to a complete stop- then trying to accelerate to take a turn or move forward- the vehicle begins to proceed then suddenly stops moving or accelerating. Twice now I have almost been T Boned.
2023 Toyota Crown · Power Train · filed with NHTSA Jul 3, 2026 · ODI 11748119
In depth: 2024 Toyota Grand Highlander transmission and drivetrain 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 power train
Source: same model, same component group7 other manufacturer communications filed against these Toyota models under the same component group (power train), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| T-SB-0082-24 REV2 | Service bulletin | Apr 17, 2026 | OBSOLETE NOTICE April 17, 2026: This bulletin is now obsolete. Please see T-SB-0028-26 |
| T-SB-0028-26 | Service bulletin | Apr 16, 2026 | Some 2024 Grand Highlander and Grand Highlander Hybrid vehicles may exhibit a rotational clicking noise from one or both front drive shaft a… |
| T-SB-0028-25 | Service bulletin | Feb 24, 2025 | Some 2023 – 2025 Crown and 2024 – 2025 Grand Highlander Hybrid vehicles equipped with a Hybrid Transmission Assembly HPC60 may exhibit a shu… |
| TSB010123 | Service bulletin | Dec 20, 2024 | TSB: Some 2023 model year Crown vehicles may exhibit a MIL ON condition with Diagnostic Trouble Code (DTC) P2C9000… |
| T-SB-0082-24 REV1 | Service bulletin | Oct 18, 2024 | Some 2024 Grand Highlander and Grand Highlander Hybrid vehicles may exhibit a rotational clicking noise from one or both front drive shaft a… |
| T-SB-0082-24 | Service bulletin | Sep 25, 2024 | Some 2024 Grand Highlander and Grand Highlander Hybrid vehicles may exhibit a rotational clicking noise from one or both front drive shaft a… |
| T-TT-0740-23 Rev | Service bulletin | Oct 6, 2023 | TT: Some 2023MY Crown Platinum grade ONLY may require a transaxle and transmission control module (TCU) replacement for low-speed vibration… |
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-0056-24 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-0056-24 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-0056-24 cover?
The manufacturer filed it against 3 model years: 2024 Toyota Crown, 2023 Toyota Crown, 2024 Toyota Grand Highlander. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.