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Service bulletin A21-084

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10205454
Published by NHTSA2021-12-22
Manufacturer's numberA21-084
Manufacturer's date2021-12-16
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

Service Bulletin - The MIL comes on with DTC P1F86 FC Cell Voltage Too Low (Caution).

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Trouble codes named

P1F86

Vehicles listed
HONDA CLARITY FUEL CELL2019, 2020, 2021 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
A21-0842021-11-02. Service bulletin. Service Bulletin - The MIL comes on with DTC P1F86 FC Cell Voltage Too Low (Caution).
A21-0082021-02-18. Service bulletin. Service Bulletin - The Hybrid System Failure message comes on the MID, and DTC P1D8D (Generator Motor Inverter Short) is stored.
APaS111920189012018-12-04. Service bulletin. "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."