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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.

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Only bulletins with component: Electrical system are shown. Show all

Bulletins, newest first
ONL6CK092120222022-09-27. 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.
A22090A2022-09-22. 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.
A19-054_version32020-04-16. 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.
A19-0062020-04-16. 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.
AJA112622019-10-09. 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.
AJA051502019-10-09. 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_version22019-06-19. 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.
A19-0542019-06-12. 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.
A19-0062019-06-12. 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.
A18-0972019-03-19. 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.
ONL6CK030520192019-03-15. 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.
ABOM011420199012019-02-10. 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."
A19-0062019-02-10. 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."
A19-0012019-02-10. 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."
A18-0132018-04-23. 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.
ATS1710022017-10-21. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Tech line summary article - Before you take a newly arrived vehicle for its first drive, make sure you charge the high-voltage lithium-ion battery. The vehicle leaves the factory with its battery state of charge level at a minimum. If you take the vehicle out on the street without first charging the battery, you could wind up running out of charge.
A17100D2017-10-21. Service bulletin. ELECTRICAL SYSTEM:12V/24V/48V BATTERY. Servicenews article - The high-voltage lithium-ion battery in the Clarity Electric has an 8-year or 100,000-mile warranty. But unlike all of our earlier vehicles with high-voltage batteries, this one doesn?t set a DTC when the battery pack capacity value has reached the level for battery replacement under warranty.
ATS1709042017-10-05. Service bulletin. FUEL SYSTEM, GASOLINE; ELECTRICAL SYSTEM. Tech line summary article - In a Code A maintenance service, you must replace the FC ion exchanger filter element. Right now, that filter element is in short supply, but we expect to have it back in stock soon.
ATS1709032017-10-05. Service bulletin. ELECTRICAL SYSTEM. Tech line summary article - A temperature sensor failure in the main hydrogen tank or sub hydrogen tank may cause DTC P1F76 (main hydrogen tank temperature sensor malfunction) or P1F77 (sub hydrogen tank temperature sensor malfunction) to set while fueling. We?re aware of this issue, and we currently have it under investigation.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.