Service bulletins for the 2023 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.
118 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
Only bulletins with component: Engine are shown. Show all
| A26-007 | 2026-10-01. Service bulletin. ENGINE. Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, and/or misfire. In some cases, DTCs P0300 through P0304 may also be stored (DTCs are not required for repair). |
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| A26-005 | 2026-10-01. Service bulletin. ENGINE. Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, and/or misfire. In some cases, DTCs P0300 through P0304 may also be stored (DTCs are not required for repair). |
| AEBM08262026901 | 2026-08-27. Other. ENGINE. Dealer Message - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, misfire, and/or DTCs P0300 through P0304 stored. |
| A26-007 | 2026-08-27. Service bulletin. ENGINE. Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, misfire and/or DTCs P0300 thru P0304 stored. |
| A26-005 | 2026-08-27. Service bulletin. ENGINE. Service Bulletin - Under certain conditions, the cylinder head gasket effectiveness may be reduced which may cause vehicles to experience overheating, coolant loss, misfire and/or DTCs P0300 thru P0304 stored. |
| A26-080 | 2026-08-05. Service bulletin. ENGINE; FUEL/PROPULSION SYSTEM. Service Bulletin - To better manage engine temperatures, a PGM-FI update has been developed to optimize electric water pump operation. |
| AEBM07242026902 | 2026-08-05. Other. ENGINE; FUEL/PROPULSION SYSTEM. Dealer Message - To help improve engine temperatures, a software update has been developed for the electric water pump to optimize its operation. |
| A25-017 | 2026-07-01. Service bulletin. ENGINE. Service Bulletin - A slight engine vibration and the Malfunction Indicator Lamp (MIL) is ON with DTC P0700 (Transmission Control System MIL Request) set during start-up in below freezing temperatures. |
| A26-025 | 2026-04-22. Service bulletin. ENGINE. Service Bulletin - The current Power Control Unit (PCU) Radiator Guard does not provide adequate protection. Roadway debris can cause damage to the PCU Radiator which may result in multiple warning lights, Malfunction Indicator Lights (MIL), and decreased hybrid system performance. |
| ATI&03032026905 | 2026-03-16. Other. ENGINE. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2023-2025 FHEV Accords & CR-Vs with a customer complaint of an oil leak or a dealer noticing an oil leak from the cylinder head cover gasket during routine maintenance. To better understand the cause of this condition, AHM would like to collect certain parts from the vehicle prior to you attempting a repair of any kind. |
| ATI&10012025906 | 2025-10-14. Other. ENGINE. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2023-2024 FHEV Accords & CR-Vs with a customer complaint of an oil leak or a dealer noticing an oil leak from the head cover gasket during routine maintenance. To better understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind. |
| A25-074 | 2025-08-08. Service bulletin. ENGINE. Service Bulletin - Oil leak at timing chain tensioner inspection cover due to possible insufficient sealant adhesion on inspection cover. |
| A25-044 | 2025-07-23. Service bulletin. ENGINE. Service 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. |
| A25-020 | 2025-02-21. Service bulletin. ENGINE. Service Bulletin - The Malfunction Indicator Lamp (MIL) is displayed and DTC P26CC (Electric Engine Coolant Pump Circuit Low Voltage) is stored when starting the vehicle in freezing temperatures. |
| A25-017 | 2025-02-05. Service bulletin. ENGINE. Service Bulletin - A slight engine vibration and the Malfunction Indicator Lamp (MIL) is ON with DTC P0700 (Transmission Control System MIL Request) set during start-up in below freezing temperatures. |
| ATI&12022024909 | 2024-12-12. Other. ENGINE. 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-Vs 1.5Ls, and 2017 Fits with customer complaint of Check Engine Light (CEL) on with DTC P0420 [Catalyst System Efficiency Below Threshold] stored. To better understand the cause of this condition, AHM would like to specific parts from the vehicle prior to you attempting a repair of any kind. |
| ATI&11052024902 | 2024-11-14. Other. ENGINE. 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-Vs 1.5Ls, and 2017 Fits with customer complaint of Check Engine Light (CEL) on with DTC P0420 [Catalyst System Effciency Below Threshold] stored. To better understand the cause of this condition, AHM would like to specific parts from the vehicle prior to you attempting a repair of any kind. |
| ONL6EY09192024 | 2024-10-24. Other. ENGINE. Owner Notification Letter - During manufacturing, certain engine blocks may have had the mounting surface of the crankshaft position sensor improperly machined. This may lead to a misfire under certain conditions, the Malfunction Indicator Lamp (MIL) illuminating or, potentially, damaging the catalytic converter. |
| ONL6EU08052024 | 2024-08-20. Emissions. ENGINE. Owner Notification Letter - Your vehicle may be equipped with an improperly functioning on-board emission-related diagnostic system that violates California and Federal standards and regulations. While transitioning from hybrid mode (engine on) to EV mode, a software programming error results in the PGM-FI ECU resetting and inappropriately erasing stored memory data in the PGM-FI ECU. In some cases, the Malfunction Indicator Lamp (MIL) may be set as a result. |
| ATI&04112024907 | 2024-04-17. Service bulletin. ENGINE AND ENGINE COOLING. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2023-2024 Accord FHEVs & CR-V FHEVs with a customer complaint of the “Emissions System Warning” Malfunction Indicator Light (MIL) on with DTC P2101 (Throttle Actuator "A" Control Motor Circuit Range/Performance) stored. Customer may experience the vehicle going into “limp home” mode. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind. |
| AATS231201 | 2023-12-23. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Techline - If you have a customer with a CR-V Hybrid/Accord Hybrid with DTC P0700 (Transmission Control System MIL Request) and check engine light is illuminated), they may notice a slight vibration (misfire) from the engine. |
| A23-048 | 2023-10-17. Service bulletin. ENGINE AND ENGINE COOLING. Service Bulletin - The vehicle may experience a no start condition, low speed rough idle, engine RPM hunting, or have the following DTCs set P0017 (Camshaft Position (CMP) Sensor B and Crankshaft Position (CKP) Sensor Correlation) or P0339 (Crankshaft Position (CKP) Sensor Circuit Intermittent Interruption). |
| A23-048 | 2023-07-27. Service bulletin. ENGINE AND ENGINE COOLING. Service Bulletin - The vehicle may experience a no start condition, low speed rough idle, engine RPM hunting, or have the following DTCs set P0017 (Camshaft Position (CMP) Sensor B and Crankshaft Position (CKP) Sensor Correlation) or P0339 (Crankshaft Position (CKP) Sensor Circuit Intermittent Interruption). |
| ABOM07212023903 | 2023-07-27. Service bulletin. ENGINE AND ENGINE COOLING. Dealer Message - Affected vehicles may be equipped with an incorrectly machined engine block at the crankshaft position sensor (CKP) mounting location. Improper manufacturing of the engine block at this location may prevent accurate CKP measurements leading to misfire and potential catalyst deterioration. This condition may affect a vehicle’s compliance with California and Federal emissions standards and regulations. |
| ABOM05122023903 | 2023-05-23. Service bulletin. ENGINE AND ENGINE COOLING. Dealer Message - American Honda is announcing a stop sale and emissions recall for certain 2023 Accord Hybrid and CR-V Hybrid vehicles. When the vehicle transitions from hybrid mode (engine on) to EV mode the FI-ECU may reset due to a software programming error and results in stored memory data in the PGM-FI ECU being inappropriately erased. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.