Use cautionVehicle recall · NHTSA · Published December 20, 2018
Honda 2018 Clarify Fuel Cell: Power Loss Risk - Recall A3O
Honda recalls 2017-2018 Clarify Fuel Cell vehicles with potential power loss causing crashes. Owners must update FC-ECU software for free by Feb 14, 2019.
“Honda 2018 Clarify Fuel Cell: Power Loss Risk - Recall A3O.” GovInfoNow, updated October 5, 2026. https://govinfonow.com/recall/1224982-honda-2018-clarify-fuel-cell-power-loss-risk-recall-a3o. Based on NHTSA recall #18V921000 (https://www.nhtsa.gov/recalls?nhtsaId=18V921000).
Honda recalled 2017-2018 Clarity Fuel Cell vehicles for a potential loss of power, according to the National Highway Traffic Safety Administration (NHTSA). The agency announced the recall on December 20, 2018. Owners should have dealers update the fuel cell control unit software free of charge.
How to tell if you have it
Honda Clarity Fuel Cell, 2017-2018
What to do
Dealers will update the FC-ECU software, free of charge. Owners may contact Honda customer service at 1-888-234-2138.
The hazard
A loss of power can increase the risk of a crash. The fuel cell control unit may misinterpret a small cell voltage drop, causing the vehicle to have a partial or complete loss of power.
Context
GovInfoNow's records show Honda has issued 245 other recalls since November 18, 2009. Recent similar recalls include the Honda CR-V Hybrid tire kit cap detachment hazard (October 8, 2026), the Honda VT750 fuel pump failure risk (October 1, 2026), and the Honda Odyssey air bag deployment risk (September 4, 2026). Other recent recalls of similar products include the Toyota RAV4 Plug-In Hybrid powertrain shutdown risk (October 7, 2026), the Toyota Lexus RZ electrical system crash risk (June 18, 2026), and the Ford Escape PHEV battery failure risk (November 14, 2025).
How to tell if you have this one
Check if your vehicle was repaired under recall 18V-068 for 2017-2018 Clarify Fuel Cell models. The recall began February 14, 2019, and applies to vehicles with the outdated software.
Brand
Honda
Category
Vehicle
Based on the official NHTSA remedy
What to do — step by step
Update FC-ECU Software
Honda dealers will update the fuel cell control unit software for free. Contact Honda customer service at 1-888-234-2138 to schedule the update.
Official remedy
What NHTSA says 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.
How this recall unfolded
Recall timeline
2 dated steps over 56 days.
1NHTSA received the defect report
2Recall began
Dates from the agency record only; steps without a date are left out.
The facts (hazard, remedy, dates, manufacturer) are pulled from the official NHTSA recall record. The plain-language summary and step-by-step checklist are written by GovInfoNow to make the official notice easier to act on — they don’t replace it.
Plain-language summary written by qwen3:4b on October 5, 2026, from the official record above. Not reviewed by a person — if it conflicts with the NHTSA notice, the notice is correct. Report an error on this page.
GovInfoNow is an independent service and is not a government agency. We republish official NHTSA recall data; we don’t issue, amend or administer recalls.