U0468Invalid Data Received From Fuel Cell Control Module
- Generic OBD-II code · Network
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- U0468 marks invalid data from the fuel cell control module, the master controller of a hydrogen car, managing air and hydrogen supply, heat and water in the stack and the split of electrical power between stack, buffer battery and drive. Partners such as the motor inverter, battery management or the hydrogen storage unit reject its frames when checksums, counters or power requests do not hold up. No manufacturer documents U0468 publicly. Hyundai's supplier Kefico ranks the unit highest among the controllers of a fuel cell vehicle, and Hyundai's Nexo campaign T5D (2019-2020) rewrote its MIL logic together with that of the hydrogen storage management unit, so a lamp is possible. U0119 is lost contact, U0293 the hybrid/EV powertrain controller. Expect a warning, battery-only limp running or no READY.
- What you may notice
- Fuel cell system warning in the cluster
- Reduced power, driving on the buffer battery only
- Vehicle does not reach READY
- Likely causes
- LikelyFuel cell control unit software needing an update from the manufacturer
- PossibleWeak 12 V battery or poor ground disturbing the controller
- PossibleConnector or bus wiring fault between the fuel cell unit and its partners
- RareInternal fault in the fuel cell control module
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.