2017–2018 Honda Clarity Fuel Cell Recall: Previous software remedy may have been incomplete
NHTSA campaign 18V921000 · Hybrid Propulsion System · filed Dec 20, 2018 · verified Jul 30, 2026
The defect
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.
The risk
A loss of power can increase the risk of a crash.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
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.
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.
Affected vehicles
| Make | Model | Model years |
|---|---|---|
| Honda | Clarity Fuel Cell | 2017, 2018 |
Related recalls
More Honda Clarity Fuel Cell recalls
Other campaigns involving Honda vehicles
Source: NHTSA recall database, campaign 18V921000 (manufacturer number A3O). Data last verified Jul 30, 2026.