Service bulletins for the 2021 Honda Accord
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
175 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
Only bulletins with component: Software are shown. Show all
| A22-009 | 2022-07-07. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL; ELECTRICAL SYSTEM:SOFTWARE; FUEL SYSTEM, GASOLINE. "Service bulletin - The MIL comes on with DTC P2DE1 (Cold Start Air Fuel Ratio Control System Rich). A new cold start emission reduction strategy was applied to detect air fuel ratio abnormalities. When certain fuel and vehicle shutoff conditions are present, the LAF sensor may incorrectly judge the air fuel ratio to be rich." |
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| A21-049 | 2021-05-25. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Service Bulletin - The MIL comes on with DTC P0236 (Turbocharger Boost Sensor Circuit Range/Performance Problem) stored. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.