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 |
| 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.
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.
| 2017 HONDA CLARITY FUEL CELL | Built 2016-11-17 to 2017-12-28. Listed as a series or trim of this model. |
|---|---|
| 2018 HONDA CLARITY FUEL CELL | Built 2017-12-29 to 2018-02-28. Listed as a series or trim of this model. |
A vehicle with no link is not in this site's catalog, which covers cars, multipurpose vehicles and trucks by model year. The campaign is from data as of 2026-10-19.
Bulletins for the same vehicles and component
| ONL6CK03052019 | 2019-03-15. Service bulletin. Owner Notification Letter - On 2017-18 Clarity Fuel Cell vehicles, the software that monitors the temperature in the fuel cell tank may not be up to date. This may cause the vehicle to incorrectly display a hydrogen system warning on the instrument panel and store a system malfunction. |
|---|---|
| A18-089 | 2018-10-15. Service bulletin. Service bulletin - There is a software problem in the climate control unit when running the heater, which may turn the MIL on. There are up to three updates that must be performed on applicable vehicles. Check the iN VIN status inquiry for applicability. |
| A18-079 | 2018-08-06. Service bulletin. Service bulletin - The MIL comes on with DTC P100C (electric VTC motor speed signal circuit malfunction) and/or P0010 (variable valve timing control [VTC] malfunction). |
| A18-079 | 2018-07-30. Service bulletin. Service bulletin - The MIL comes on with DTC P100C (electric VTC motor speed signal circuit malfunction) and/or P0010 (variable valve timing control [VTC] malfunction). |
| A18-069 | 2018-07-02. Service bulletin. Service bulletin - The HV range display reading is unusually high. There is a software error in the miles per gallon calculation, which affects the remaining HV range display. |
A bulletin is the manufacturer's note to its dealers. It is not part of this recall.