Honda bulletin A23-008
What it saysUnder certain circumstances, after coming to a stop and the idle stop feature engages, the vehicle may not automatically restart. NHTSA’s full summary ↓
Honda filed this with NHTSA as a service bulletin dated Nov 10, 2023, received Jan 11, 2023, about the engine — 3 documents under this number. It names 21 model years (2016–2023). 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 communicationService Bulletin - Under certain circumstances, after coming to a stop and the idle stop feature engages, the vehicle may not automatically restart. Typically, the customer can immediately restart the vehicle by selecting Park and pushing the ENGINE START/STOP button.
Documents filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| A23-008 | Service bulletin | Nov 10, 2023 | 10245550 | PDF, 240 KB |
| A23-008 | Service bulletin | Jan 25, 2023 | 10231048 | PDF, 963 KB |
| A23-008 | Service bulletin | Jan 6, 2023 | 10229675 | PDF, 958 KB |
What the document itself lists
The manufacturer titles it “Product Update: PGM-FI Idle Stop Software Update”.
Parts the bulletin names
| Part number | Description | Qty | Find it |
|---|---|---|---|
| 37805-RLV-B43 | Odyssey | — | eBay Motors → |
| 37805-5MR-C21 | — | — |
Labour operation and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 1255G6 | Update the PGM-FI Software (Idle Stop) | 0.2 hrs |
Read by machine from the document NHTSA serves (5 pages), read Oct 4, 2026. A part number is shown only where it matches Honda’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.
Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
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.
Doing the repair yourself, or pricing it before the shop does? Search the part by fitment on eBay Motors — the listing and the price are the seller’s.
Find the software for the 2023 Odyssey →Affiliate disclosure: some links on this page are affiliate links. If you request a quote or buy through them we may earn a commission at no extra cost to you. Nothing on this page changes because of it.
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 21 model years this bulletin names have filed 9,175 complaints with NHTSA since 2015. 5,355 of them name Engine, 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.
On the 2016 Honda Pilot, the 296 owners who gave an odometer reading for Electrical System reported it at a median of 50,000 miles. That figure is one model year’s, not the whole range this bulletin covers — medians from different model years are not averaged.
My Ridgeline have a wireless charger that fails charging and and makes the phone hot after trying to charge the phone and fails, my Honda dealer replaced the unit but the problem persist, I did find that is not only my vehicle but a lot more and Honda is aware of the situation, my concern is that this charger can make my phone explode…
2021 Honda Ridgeline · Electrical System · filed with NHTSA Oct 23, 2021 · ODI 11437877
While driving a crackle is emitted from the front speakers. The tuner will blank out and display "check tuner", then the entire instrument pod goes dark. No speedometer, no other instrument information. Appears to be doing a reboot , while the car is in motion. Seems to be related to turning corners or hitting small bumps in the road.
2019 Honda Passport · Electrical System · filed with NHTSA Jan 27, 2020 · ODI 11302157
Engine fails to restart after Idle Stop engaged. Engine stops normally when brake pedal is pressed and vehicle comes to full stop. Brake pedal is then released to restart engine but the engine does not start. Dashboard says "Shift to Park". The transmission is shifted to Park and then Start button is pushed to restart engine.
2020 Honda Ridgeline · Engine · filed with NHTSA Oct 12, 2022 · ODI 11488999
In depth: 2021 Honda Odyssey electrical problems → · 2020 Honda Odyssey engine problems → · 2020 Honda Odyssey electrical problems → · 2019 Honda Odyssey engine 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 engine
Source: same model, same component group37 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 |
|---|---|---|---|
| ATI&05122026902 | Other | May 13, 2026 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2024-2026 Odysseys & Ridgelines and 2024-2025 Passports with… |
| ATI&05122026901 | Other | May 13, 2026 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2025 Pilots with customer complaint of Check Engine Light… |
| ATI&04292026901 | Other | Apr 29, 2026 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2024-2026 Odysseys & Ridgelines and 2024-2025 Passports with… |
| ATI&04272026904 | Other | Apr 27, 2026 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2025 Pilots with customer complaint of Check Engine Light… |
| ATI&04132026905 | Other | Apr 13, 2026 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2025 Pilots with customer complaint of Check Engine Light… |
| A26-001 | Service bulletin | Feb 1, 2026 | Service Bulletin - The piston ring function deteriorates due to ring low wear toughness and sticking from sludge. Oil adheres to the spark p… |
| ATI&01302026904 | Other | Jan 31, 2026 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2025 Pilots with customer complaint of Check Engine Light… |
| ATI&01142026905 | Other | Jan 14, 2026 | Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2025 Pilots with customer complaint of Check Engine Light… |
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 A23-008 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 A23-008 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 A23-008 cover?
The manufacturer filed it against 21 model years: 2023 Honda Odyssey, 2022 Honda Odyssey, 2021 Honda Odyssey, 2020 Honda Odyssey, 2019 Honda Odyssey, 2018 Honda Odyssey and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.