Image available on the official notice.
Passenger car (Honda CLARITY) - Repair
Official notice
18 Dec 2018
Last checked
27 Oct 2026
An official CAA Japan notice concerns Passenger car (Honda CLARITY) - Repair. Defect in the electric motor control device (fuel cell control computer). ■ Defective area (component name): Electric motor control device (fuel cell control computer). ■ Condition and cause of the structure, equipment, or performance considered noncompliant with the standards: Due to an inappropriate fuel cell stack fault detection program in the fuel cell control computer (FC‐ECU), a decrease in fuel cell stack cell voltage when the high-voltage battery is fully charged may be incorrectly detected as fuel cell stack deterioration. This may cause the warning light and warning display to illuminate and the fuel cell system to stop. In the worst case, the vehicle may become unable to be driven. Published 2018-12-18.
What to do now
(Recall) 4406 ■ Corrective measures: Rewrite the fuel cell stack fault detection program with a corrected program on all vehicles.
Recall number
4406
Official notice
2018-12-18
The hazard
The hazard
Defect in the electric motor control device (fuel cell control computer). ■ Defective area (component name): Electric motor control device (fuel cell control computer). ■ Condition and cause of the structure, equipment, or performance considered noncompliant with the standards: Due to an inappropriate fuel cell stack fault detection program in the fuel cell control computer (FC‐ECU), a decrease in fuel cell stack cell voltage when the high-voltage battery is fully charged may be incorrectly detected as fuel cell stack deterioration. This may cause the warning light and warning display to illuminate and the fuel cell system to stop. In the worst case, the vehicle may become unable to be driven.
How to check if you're affected
How to check if you're affected
Compare the product name and identifiers below with the item you own. Check the official notice for the affected products and next steps.
Recall Numbers
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Affected products
Product 1
Hazard
Where it was sold
Where it was sold
Retailer information is not currently available in RecallScope. Check the official notice for distribution details.
Location 1
Affected area 1
Company & contacts
Company & contacts
Brand: Honda. Contact: 本田技研工業株式会社. Phone 0120-112010.
Source & status
Source & status
Recall details
Recall details
Recall number
Event id
Source tier
Documents, notices & source
See the official notice and source documents for full details.
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