NHTSA Recall 18V921000: Hybrid propulsion system and software (electrical system)
Honda (American Honda Motor Co.) reported this safety recall to NHTSA on , covering an estimated 1,082 vehicles. It affects 2017–2018 Honda Clarity Fuel Cell.
| NHTSA campaign | 18V921000 |
|---|---|
| Manufacturer campaign | A3O |
| Components | HYBRID PROPULSION SYSTEM; ELECTRICAL SYSTEM › SOFTWARE |
| Report received | December 20, 2018 |
| Owner notification | February 14, 2019 |
| Initiated by | Manufacturer |
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.
Safety risk
A loss of power can increase the risk of a crash.
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.
Vehicles covered by recall 18V921000
Being listed here means the campaign covers the model year, not that every car was built with the defect or is still unrepaired. Enter your VIN above to check your specific vehicle. Recall repairs are free at authorised dealers. Source: NHTSA, October 2026.