# NHTSA recall 18V921000

A recall listed here may apply to a vehicle of this year, make and model. Only the manufacturer can say whether it applies to one vehicle: check the VIN with the official lookups.

- Published by: NHTSA \(United States\)
- Campaign number: 18V921000
- Manufacturer's number: A3O
- Manufacturer: Honda \(American Honda Motor Co.\)
- Reported: 2018\-12\-20
- Owners notified: 2019\-02\-14
- Component: ELECTRICAL SYSTEM:SOFTWARE; HYBRID PROPULSION SYSTEM
- Units potentially affected: 1082

## What is wrong

Honda \(American Honda Motor Co.\) is recalling certain 2017\-2018 Clarity Fuel Cell vehicles previously repaired under recall 18V\-068. The previous software remedy may have been incomplete. As a result, the fuel cell control unit \(FC\-ECU\) may misinterpret a small cell voltage drop, causing the vehicle to have a partial or complete loss of power.


## What can happen

A loss of power can increase the risk of a crash.


## The remedy

Honda has notified owners, and dealers will update the FC\-ECU software, free of charge.  The recall began February 14, 2019.  Owners may contact Honda customer service at 1\-888\-234\-2138.  Honda's number for this recall is A3O.


## Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1\-888\-327\-4236 \(TTY 1\-800\-424\-9153\), or go to www.safercar.gov.


## Remedy progress the manufacturer reported

- Report: Quarterly report 6, for 2020 quarter 2
- Filed with NHTSA: 2020\-07\-14
- Vehicles in the campaign: 1082
- Reported remedied: 1061 \(98%\)
- Reported unreachable: 0
- Reported removed: 3

These are the manufacturer's totals for the whole campaign at the end of 2020 quarter 2, as filed with NHTSA. They do not say whether one vehicle has been remedied: check the VIN with the official lookups. The reports are from data as of 2026\-10\-19.

## Vehicles this campaign lists

- [2017 HONDA CLARITY FUEL CELL](/makes/honda/clarity/2017/recalls.md). Built 2016\-11\-17 to 2017\-12\-28. Listed as a series or trim of this model.
- [2018 HONDA CLARITY FUEL CELL](/makes/honda/clarity/2018/recalls.md). Built 2017\-12\-29 to 2018\-02\-28. Listed as a series or trim of this model.

## Bulletins for the same vehicles and component

A bulletin is the manufacturer's note to its dealers. It is not part of this recall.

- [ONL6CK03052019](/bulletins/10154481.md), 2019-03-15, Service bulletin
- [A18\-089](/bulletins/10145429.md), 2018-10-15, Service bulletin
- [A18\-079](/bulletins/10143337.md), 2018-08-06, Service bulletin
- [A18\-079](/bulletins/10143164.md), 2018-07-30, Service bulletin
- [A18\-069](/bulletins/10142444.md), 2018-07-02, Service bulletin

## Check a VIN

- [NHTSA recall lookup by VIN, United States](https://www.nhtsa.gov/recalls)
- [Transport Canada recall search, Canada](https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng)

JSON: [/v1/recalls/nhtsa/18V921000](/v1/recalls/nhtsa/18V921000)

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