Affected Component: ELECTRICAL SYSTEM

Date Published
MAY 05, 2022
NHTSA TSB #
10220144
TSB Document
Summary
TSB: Some 2016 ? 2019 model year Mirai vehicles may exhibit a warning message, ?FC malfunction, return vehicle to dealer for service.? This message is accompanied by Diagnostic Trouble Code (DTC) P1DEF (450 FC Stack Performance). The Fuel Control Module (FCM) calibration has been revised to address this condition