Honda bulletin A23-043
What it saysSome customers experience the following errors: DTC U1803 and Code TT06. NHTSA’s full summary ↓
Honda filed this with NHTSA as a service bulletin dated May 19, 2023, received May 31, 2023, about the electrical system. It names 1 model year (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 - Some customers experience the following errors: DTC U1803 and Code TT06. A software issue is causing an internal Ethernet error in the CAN Gateway Unit (CGW).
Trouble codes it names: U1803
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| A23-043 | Service bulletin | May 19, 2023 | 10237040 | PDF, 1,016 KB |
What the document itself lists
Labour operations and the time the manufacturer allows
| Operation | Description | Time |
|---|---|---|
| 0545A2 | Restart the OTA System (includes DTC check and clear) | 0.2 hrs |
| A23043A | 5J800-30B-A06 A Update the CAN Gateway Unit software | 0.1 hrs |
Read by machine from the document NHTSA serves (4 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.
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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 1 model year this bulletin names have filed 233 complaints with NHTSA since 2015. 73 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.
I bought a 2023 Honda accord sport hybrid June of 2023 two weeks after purchasing the vehicle it starting giving me issues such as the dash board and infotainment screen would freeze up and completely erase itself I took it to the dealership 2 times they told me that if it didn’t do it at the dealership there was nothing they could do so…
2023 Honda Accord · Electrical System · filed with NHTSA Jan 19, 2024 · ODI 11566404
In depth: 2023 Honda Accord electrical 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 electrical system
Source: same model, same component group32 other manufacturer communications filed against the Honda Accord under the same component group (electrical system), newest first. The eight newest are listed; the rest are on the Honda list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| ONL6LA10152026 | Other | Oct 15, 2026 | Owner Notification Letter - a programming issue within the Wireless CarPlay and Android Auto software may cause an invalid "License Authenti… |
| AATS31549 | Other | Oct 1, 2026 | Tech Line Summary Article - Customers may report that the center display unit changes screens on its own, registers unintended inputs, or op… |
| AAHS09162026902 | Other | Sep 16, 2026 | Dealer Message - On August 21st, 2026, American Honda issued a Product Update for certain 2018-2022 Accord and Accord Hybrid models that rec… |
| AEBM08212026901 | Other | Aug 21, 2026 | Dealer Message - Due to a software programming issue within the Wireless CarPlay and Android Auto system, an invalid "License Authentication… |
| A26-068 | Service bulletin | Aug 21, 2026 | Service Bulletin - On certain 2018-2022 Accord and 2018-22 Accord Hybrid vehicles equipped with the Wireless CarPlay and Android Auto softwa… |
| 8B010-30A-A070 | Over-the-air update | May 15, 2026 | Over The Air - Due to a software programming issue of the Telematics Control Unit (TCU, also referred to as TSU), certain functions may not… |
| AATS30566 | Other | Apr 7, 2026 | Tech Line Summary - The vehicle's infotainment system displays previously viewed SMS messages upon each ignition cycle, when the customer's… |
| 1.013.003 OR LATER | Over-the-air update | Feb 24, 2026 | Over The Air - Due to a software programming issue of the Telematics Control Unit (TCU, also referred to as TSU), certain functions may not… |
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 A23-043 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 A23-043 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 A23-043 cover?
The manufacturer filed it against 1 model year: 2023 Honda Accord. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.