Toyota bulletin 23TC06B
What it saysRL: Due to certain programming in the Electronic Parking Brake ECU, under certain conditions, the parking brake light may flash, a parking brake malfunction message will be displayed, and the electronic parking brake… NHTSA’s full summary ↓
Toyota filed this with NHTSA as a service bulletin dated Nov 16, 2023, received Dec 26, 2023, about the parking brake. It names 2 model years (2022–2023). 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 communicationRL: Due to certain programming in the Electronic Parking Brake ECU, under certain conditions, the parking brake light may flash, a parking brake malfunction message will be displayed, and the electronic parking brake may not release.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 23TC06B | Service bulletin | Nov 16, 2023 | 10247815 | 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 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 848 complaints with NHTSA since 2015.
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 parking brake
Source: same model, same component group3 other manufacturer communications filed against the Toyota Tundra under the same component group (parking brake), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| 23TC06C | Service bulletin | Nov 16, 2023 | TI: TECHNICAL INSTRUCTIONS FOR SPECIAL SERVICE CAMPAIGN 23TC06 Electronic Parking Brake (EPB) DTC C059704 Certain 2022 & 2023 Model Year T… |
| 23TC06A | Service bulletin | Nov 16, 2023 | DP: Due to certain programming in the Electronic Parking Brake ECU, under certain conditions, the parking brake light may flash, a parking b… |
| 23TC06 | Service bulletin | Nov 15, 2023 | DP: Due to certain programming in the Electronic Parking Brake ECU, under certain conditions, the parking brake light may flash, a parking b… |
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 23TC06B 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 23TC06B 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 23TC06B cover?
The manufacturer filed it against 2 model years: 2023 Toyota Tundra, 2022 Toyota Tundra. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.