Honda bulletin ONL6M208142023
What it saysOwner Notification Letter - On some 2018-2019 Fit vehicles, a combination of carbon deposits on the intake valves and the PGM-FI software settings may lead to reduced combustion stability under certain circumstances. NHTSA’s full summary ↓
Honda filed this with NHTSA as a service bulletin dated Aug 14, 2023, received Aug 18, 2023, about the engine. It names 2 model years (2018–2019). 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 Notification Letter - On some 2018-2019 Fit vehicles, a combination of carbon deposits on the intake valves and the PGM-FI software settings may lead to reduced combustion stability under certain circumstances. This results in a misfire being detected and Malfunction Indicator Lamp (MIL) being illuminated.
One of the 432 warranty extensions and special-coverage programs on file — every make, with the term each runs to.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| ONL6M208142023 | Service bulletin | Aug 14, 2023 | 10240777 | PDF, 115 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 255 complaints with NHTSA since 2015. 40 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.
I purchased a new Honda Fit in 2018. In November 2019, at 31,000 miles several indicator lights came on. The check engine, TPMS, Vehicle Stability assist, Electric Power System. The car was running smoothly but I was told by a Honda dealer there was excessive carbon build up. The cost to clean it out would be $500.
2018 Honda Fit · Engine · filed with NHTSA Aug 24, 2021 · ODI 11430269
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 group20 other manufacturer communications filed against the Honda Fit under the same component group (engine), newest first. The eight newest are listed; the rest are on the Honda list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| ATI&03072025901 | Other | Mar 8, 2025 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017 Fits with customer complaint of Check Engine Light (CEL)… |
| ATI&02212025901 | Other | Feb 22, 2025 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017 Fits with customer complaint of Check Engine Light (CEL)… |
| ATI&02072025901 | Other | Feb 8, 2025 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017 Fits with customer complaint of Check Engine Light (CEL)… |
| ATI&01082025901 | Other | Jan 9, 2025 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017 Fits with customer complaint of Check Engine Light (CEL)… |
| ATI&12022024909 | Other | Dec 3, 2024 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2018-2024 Accord 1.5Ls, 2021-2024 Civics 1.5Ls, 2023-2024 CR… |
| ATI&11052024902 | Other | Nov 5, 2024 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2018-2024 Accord 1.5Ls, 2021-2024 Civics 1.5Ls, 2023-2024 CR… |
| ATI&10232024907 | Other | Oct 23, 2024 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017 Fits with customer complaint of Check Engine Light (CEL)… |
| ATI&10022024908 | Other | Oct 2, 2024 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2017 Fits with customer complaint of Check Engine Light (CEL)… |
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 ONL6M208142023 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 ONL6M208142023 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 ONL6M208142023 cover?
The manufacturer filed it against 2 model years: 2019 Honda Fit, 2018 Honda Fit. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.