Honda bulletin ONL6CK09212022
What it saysOwner's Notification Letter - Product Update - Our records indicate that a Product Update has not been completed on this vehicle (Vehicle Identification Number XXXXXXXXXXXXXXXXX). NHTSA’s full summary ↓
Honda filed this with NHTSA as a service bulletin dated Sep 21, 2022, received Sep 27, 2022, about the electrical system. It names 2 model years (2017–2018). 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 communicationOwner's Notification Letter - Product Update - Our records indicate that a Product Update has not been completed on this vehicle (Vehicle Identification Number XXXXXXXXXXXXXXXXX). The software that monitors the temperature in the fuel cell tank may not be up to date. This may cause the vehicle to incorrectly display a hydrogen system warning on the instrument panel and store a system malfunction.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| ONL6CK09212022 | Service bulletin | Sep 21, 2022 | 10222081 | PDF, 106 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 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 168 complaints with NHTSA since 2015. 27 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.
The vehicle exhibits a dangerous electrical defect involving uncontrolled power-cycling. After shutting down the car, it automatically restarts itself in a continuous loop. During these episodes, the dashboard flickers, the drivetrain shudders, and the vehicle becomes unresponsive to manual 'Stop' button or brake inputs.
2018 Honda Clarity · Electrical System · filed with NHTSA Jan 3, 2026 · ODI 11708588
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 group4 other manufacturer communications filed against the Honda Clarity under the same component group (electrical system), newest first.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| A18-090 | Service bulletin | Nov 14, 2023 | Service Bulletin - There is a software problem in the PCM, which may cause the MIL to come on with DTC P26A3… |
| A22090A | Service bulletin | Sep 16, 2022 | Dealer Message - In the event you experience a sub tank wire harness rodent damage on the 2017â2020 Clarity FCV, after repairing / replaci… |
| ONL6PH09152022 | Service bulletin | Sep 15, 2022 | Owner's Notification Letter - Our records indicate that a PRODUCT UPDATE has not been completed on this vehicle… |
| AJA11262 | Service bulletin | Oct 5, 2019 | Job Aid - American Honda has created an instructional video on how to replace the fuel cell stack. When working on or around the fuel cell s… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Honda, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Honda ONL6CK09212022 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 ONL6CK09212022 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 Honda warranty extension on file lists the ones Honda has filed.
Which vehicles does ONL6CK09212022 cover?
The manufacturer filed it against 2 model years: 2018 Honda Clarity, 2017 Honda Clarity. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.