Service bulletins for the 2017 Honda Clarity
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.
32 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
| ONL6CK09212022 | 2022-09-27. Service bulletin. ELECTRICAL SYSTEM. Owner's Notification Letter - Product Update - Our records indicate that a Product Update has not been completed on this vehicle (Vehicle Identification Number XXXXXXXXXXXXXXXXX). The software that monitors the temperature in the fuel cell tank may not be up to date. This may cause the vehicle to incorrectly display a hydrogen system warning on the instrument panel and store a system malfunction. |
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| A22090A | 2022-09-22. Service bulletin. ELECTRICAL SYSTEM. Dealer Message - In the event you experience a sub tank wire harness rodent damage on the 2017–2020 Clarity FCV, after repairing / replacing the wire harness, wrap the areas shown below with RODENT DETERRENT TAPE, P/N 4019-2317. |
| A20-092 | 2020-12-19. Service bulletin. FUEL SYSTEM, GASOLINE. Service Bulletin - The customer cannot refuel the vehicle completely at certain hydrogen stations. |
| A20-061 | 2020-10-29. Service bulletin. FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY. Service Bulletin - The MIL comes on with DTC P1FBF (air pump controller failure [internal failure warning]) during startup. |
| A20-061 | 2020-09-09. Service bulletin. FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY. Service Bulletin - The MIL comes on with DTC P1FBF (air pump controller failure [internal failure warning]) during startup. |
| A19-054_version3 | 2020-04-16. Service bulletin. ELECTRICAL SYSTEM; FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY. Service Bulletin - The fuel cell (FC) system uses an electric water pump to circulate insulating fluid and remove excess heat from the fuel cell stack. During manufacturing, the water pump's magnetic surface was not treated for corrosion resistance. Over time, the corrosion may prevent the water pump's motor from starting, which will prevent the vehicle from starting. If this happens while driving, the vehicle can only be driven for a short distance at greatly reduced power. |
| A19-006 | 2020-04-16. Service bulletin. FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY; ELECTRICAL SYSTEM. Service Bulletin - Water improperly discharged inside the fuel cell (FC) stack mixes with hydrogen and oxygen, generating hydrogen peroxide. The hydrogen peroxide/water combination concentrates in one area, accelerating the deterioration of the electrolyte membrane in the fuel cell. This deterioration can reduce fuel cell output. |
| AJA11262 | 2019-10-09. Service bulletin. FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY; ELECTRICAL SYSTEM. Job Aid - American Honda has created an instructional video on how to replace the fuel cell stack. When working on or around the fuel cell system, pay attention to the service precautions for the fuel cell system. |
| AJA05150 | 2019-10-09. Service bulletin. FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY; ELECTRICAL SYSTEM. Job Aid - The following procedures in the service information require the Fuel Cell Service Equipment Kit (T/N VSBHONFCVKT1) and the Portable Vent Stack (T/N FEFPVS). |
| A19-054_version2 | 2019-06-19. Service bulletin. ELECTRICAL SYSTEM. Service Bulletin - The fuel cell (FC) system uses an electric water pump to circulate insulating fluid and remove excess heat from the fuel cell stack. During manufacturing, the water pump's magnetic surface was not treated for corrosion resistance. Over time, the corrosion may prevent the water pump's motor from starting, which will prevent the vehicle from starting. If this happens while driving, the vehicle can only be driven for a short distance at greatly reduced power. |
| A19-054 | 2019-06-12. Service bulletin. FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY; ELECTRICAL SYSTEM. Service Bulletin - The fuel cell (FC) system uses an electric water pump to circulate insulating fluid and remove excess heat from the fuel cell stack. During manufacturing, the water pump's magnetic surface was not treated for corrosion resistance. Over time, the corrosion may prevent the water pump's motor from starting, which will prevent the vehicle from starting. If this happens while driving, the vehicle can only be driven for a short distance at greatly reduced power. |
| A19-006 | 2019-06-12. Service bulletin. FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY; ELECTRICAL SYSTEM. Service Bulletin - Water improperly discharged inside the fuel cell stack mixes with hydrogen and oxygen, generating hydrogen peroxide. The hydrogen peroxide/water combination concentrates in one area, accelerating the deterioration of the electrolyte membrane in the fuel cell. This deterioration can reduce fuel cell output. |
| A19050B | 2019-05-30. Service bulletin. STEERING. ServiceNews Article - When removing and installing a cable reel, you need to keep both the cable reel and the steering angle sensor in position. If you don't , the VSA indicator may come on along with one or more VSA DTCs. And when you run the Neutral Memorization Procedure in the i-HDS, it won't complete. |
| A18-097 | 2019-03-19. Service bulletin. ELECTRICAL SYSTEM; ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Service Bulletin - The Clarity Plug-In Hybrid and Clarity Electric may not start charging when plugged in or may stop charging before the high-voltage lithium-ion battery is full. |
| ONL6CK03052019 | 2019-03-15. Service bulletin. ELECTRICAL SYSTEM:SOFTWARE; FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY. Owner Notification Letter - On 2017-18 Clarity Fuel Cell vehicles, the software that monitors the temperature in the fuel cell tank may not be up to date. This may cause the vehicle to incorrectly display a hydrogen system warning on the instrument panel and store a system malfunction. |
| A19-006 | 2019-02-21. Service bulletin. FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY. Service Bulletin - The telematics system is reporting deterioration of the fuel cell stack. This deterioration can reduce fuel cell output. Water improperly discharged inside the fuel cell stack mixes with hydrogen and oxygen, generating hydrogen peroxide. The hydrogen peroxide/water combination concentrates in one area, accelerating the deterioration of the electrolyte membrane in the fuel cell. |
| ABOM01142019901 | 2019-02-10. Service bulletin. ELECTRICAL SYSTEM; EQUIPMENT:ELECTRICAL. "Dealer message - Today American Honda is notifying dealers of two product updates affecting certain 2017-18 Clarity Fuel Cell vehicles. The first is a software update to the hydrogen tank temperature sensors. The second is a product update to replace the fuel cell stack on a limited number of vehicles due to premature deterioration." |
| A19-006 | 2019-02-10. Service bulletin. FUEL SYSTEM, DIESEL:STORAGE:TANK ASSEMBLY; ELECTRICAL SYSTEM. "Service bulletin - The telematics system is reporting deterioration of the fuel cell stack. This deterioration can reduce fuel cell output. Water improperly discharged inside the fuel cell stack mixes with hydrogen and oxygen, generating hydrogen peroxide. The hydrogen peroxide/water combination concentrates in one area, accelerating the deterioration of the electrolyte membrane in the fuel cell." |
| A19-001 | 2019-02-10. Service bulletin. ELECTRICAL SYSTEM. "Service bulletin - The vehicle may incorrectly set DTC P1F76 (main hydrogen tank temperature sensor malfunction) or P1F77 (sub hydrogen tank temperature sensor malfunction). The fuel cell communication control (IR) software is not current." |
| APaS12052018901 | 2018-12-14. Service bulletin. ENGINE AND ENGINE COOLING. "Dealer message - AHM is studying the current replacement need for the ION filter (PN 3H450-5WM-A01). We would like to collect several samples in the field for this study. A supply of bags and identifying labels will be sent to your dealership for this project." |
| A18110B | 2018-11-30. Service bulletin. ENGINE AND ENGINE COOLING. "ServiceNews Article - When replacing the fuel cell stack, make sure you bleed the air from the fuel cell insulating system exactly as called out in the fuel cell insulating fluid replacement procedure in the service information. If you don't, you'll get an FC Coolant Low. See Your Dealer message in the driver information interface shortly after your repair and/or will damage the new fuel cell stack." |
| A17070B | 2018-07-16. Service bulletin. ENGINE AND ENGINE COOLING. Servicenews article - The Clarity Fuel Cell vehicle has two very different cooling systems. One system cools the fuel cell system; the other one cools the inverter system. The fuel cell system uses a 50% coolant mixture called fuel cell insulating fluid, This fluid can't be mixed with any other fluid. Doing so cuts its insulating properties and will damage the fuel cell system. |
| A18-013 | 2018-04-23. Service bulletin. STEERING; ELECTRICAL SYSTEM. Service bulletin - The audio system volume will not change when using the remote switch on the steering wheel. There is an internal software issue with the audio-navigation unit. |
| ATS180103 | 2018-03-05. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER. Tech line summary article - Some dealers have reported that when plugged into their Level II 240-volt charger, the vehicle won?t charge or it stops charging early. We?re aware of this issue and have it under investigation |
| ATS180102 | 2018-03-05. Service bulletin. VISIBILITY; POWER TRAIN. Tech Line summary article - We?re looking at an issue of the driver?s power mirror not working and/or working oddly. It?s been reported, for instance, that when adjusting the driver?s power mirror, the passenger?s power mirror may respond instead. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.