Service bulletins for the 2021 Honda Odyssey
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.
152 on file from NHTSA, as of 2026-10-19.
About P0456 on the 2021 Honda Odyssey: what the code means, and the bulletins and recalls about the same components.
By type
By component
By trouble code
Only bulletins with trouble code: P0456 are shown. Show all
| ATI&11032021902 | 2021-11-09. Service bulletin. FUEL SYSTEM, GASOLINE. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2021 Odysseys with a customer complaint of fuel smell and/or MIL on with DTC P0456 (EVAP System Very Small Leak Detected) stored. To better understand the cause of this condition, AHM would like to inspect & collect specific information from the vehicle prior to you attempting a repair of any kind. |
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| ATI&10052021907 | 2021-10-16. Service bulletin. ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2021 Odysseys with a customer complaint of fuel smell and/or MIL on with DTC P0456 (EVAP System Very Small Leak Detected) stored. To better understand the cause of this condition, AHM would like to inspect & collect specific information from the vehicle prior to you attempting a repair of any kind. |
| ATI&09102021908 | 2021-09-15. Service bulletin. FUEL SYSTEM, GASOLINE. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2021 Odysseys with a customer complaint of fuel smell and/or MIL on with DTC P0456 (EVAP System Very Small Leak Detected) stored. To better understand the cause of this condition, AHM would like to inspect & collect specific information from the vehicle prior to you attempting a repair of any kind. |
| ATI&08252021908 | 2021-09-02. Service bulletin. ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2021 Odysseys with a customer complaint of fuel smell and/or MIL on with DTC P0456 (EVAP System Very Small Leak Detected) stored. To better understand the cause of this condition, AHM would like to inspect & collect specific information from the vehicle prior to you attempting a repair of any kind. |
| ATI&08092021902 | 2021-08-17. Service bulletin. FUEL SYSTEM, GASOLINE. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2021 Odysseys with a customer complaint of fuel smell and/or MIL on with DTC P0456 (EVAP System Very Small Leak Detected) stored. To better understand the cause of this condition, AHM would like to inspect & collect specific information from the vehicle prior to you attempting a repair of any kind. |
| ATI&07222021901 | 2021-07-27. Service bulletin. FUEL SYSTEM, GASOLINE. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2021 Odysseys with a customer complaint of fuel smell and/or MIL on with DTC P0456 (EVAP System Very Small Leak Detected) stored. To better understand the cause of this condition, AHM would like to inspect & collect specific information from the vehicle prior to you attempting a repair of any kind. |
| ATI&07202021902 | 2021-07-27. Service bulletin. FUEL SYSTEM, GASOLINE. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2021 Odysseys with a customer complaint of fuel smell and/or MIL on with DTC P0456 (EVAP System Very Small Leak Detected) stored. To better understand the cause of this condition, AHM would like to inspect & collect specific information from the vehicle prior to you attempting a repair of any kind. |
| ATI&07062021 | 2021-07-20. Service bulletin. FUEL SYSTEM, GASOLINE. Dealer Message - American Honda Motor Co., Inc. (AHM) is searching for certain 2020-2021 Odysseys with a customer complaint of fuel smell and/or MIL on with DTC P0456 (EVAP System Very Small Leak Detected) stored. To better understand the cause of this condition, AHM would like to inspect & collect specific information from the vehicle prior to you attempting a repair of any kind. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.