Honda bulletin A25-044
What it saysThe engine runs rough and makes a rattling noise, accompanied by DTC P0134 or P0135 due to a possible fuel injector leak causing a rich air/fuel (A/F) mixture that fouls the spark plug(s) and causing the PCM to misread… NHTSA’s full summary ↓
Honda filed this with NHTSA as a service bulletin dated Jul 8, 2025, received Jul 23, 2025, about the engine. It names 6 model years (2023–2025). 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 communicationService Bulletin - The engine runs rough and makes a rattling noise, accompanied by DTC P0134 or P0135 due to a possible fuel injector leak causing a rich air/fuel (A/F) mixture that fouls the spark plug(s) and causing the PCM to misread the A/F sensor heater resistance. Other DTCs may also include: P0700, P0300, P219C, P219D, P219E, P219F, P0172.
Trouble codes it names: P0134 P0135 P0172 P0300 P0700 P219C P219D P219E P219F
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| A25-044 | Service bulletin | Jul 8, 2025 | 11020826 | PDF, 182 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 6 model years this bulletin names have filed 1,942 complaints with NHTSA since 2015. 42 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 2023 Honda Accord from Woodland Hills Honda on 1/20/24. On 1/23/24, I pull into my garage after driving home from work and turn off the car. I get out to an overwhelming smell of gasoline. I inspect the car for visible leaks, which I don’t see, but the gasoline fumes kept growing and spreading throughout my garage.
2023 Honda Accord · Engine · filed with NHTSA Jan 31, 2024
This is a complaint about the unresolved recall that I have been put on a waitlist for many months now. The Dealership said that Honda will mail me when the parts will be ready for repaired, but it’s been many months since the NHTSA saying the remedy is available.
2025 Honda CR-V · Engine · filed with NHTSA Nov 30, 2024
I put my Honda CRV Hybid away in my garage while it was running on battery power. It is silent when not in gear and operating on battery power. The key fob was in the car. I forgot to shut off the power switch before getting out of the car.
2024 Honda CR-V · Engine · filed with NHTSA Nov 27, 2023
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 group61 other manufacturer communications filed against these Honda models 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 |
|---|---|---|---|
| A26-098 | Service bulletin | Sep 25, 2026 | Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience ov… |
| A26-019 | Service bulletin | Sep 25, 2026 | Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience ov… |
| A26-018 | Service bulletin | Sep 25, 2026 | Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience ov… |
| A26-017 | Service bulletin | Sep 25, 2026 | Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience ov… |
| A26-016 | Service bulletin | Sep 25, 2026 | Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience ov… |
| A26-007 | Service bulletin | Sep 25, 2026 | Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience ov… |
| A26-006 | Service bulletin | Sep 25, 2026 | Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience ov… |
| A26-005 | Service bulletin | Sep 25, 2026 | Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience ov… |
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 A25-044 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 A25-044 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.
Which vehicles does A25-044 cover?
The manufacturer filed it against 6 model years: 2025 Honda Accord, 2024 Honda Accord, 2023 Honda Accord, 2025 Honda CR-V, 2024 Honda CR-V, 2023 Honda CR-V. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.