U044BInvalid Data Received From Battery Energy Control Module C
- Generic OBD-II code · Network
- Can trigger limp mode
- How the car detects it
- A third battery controller, module C, appears where a pack is divided into separately managed sections or a vehicle has more than one battery system. A receiver, typically the hybrid or vehicle controller, sets U044B when C's frames on cell voltages, temperatures, state of charge or contactor status fail validity checks; U014A is lost contact, U0412 and U0413 cover modules A and B. No manufacturer documents U044B publicly. Volkswagen group documents number such controllers: Bentley bulletin 2051553/2 for the 2017-18 Bentayga logs battery and sensor faults under battery management 2, the unit serving the dynamic ride roll control. Expect reduced electric power or a hybrid system warning, since the receiver cannot rely on the pack data.
- What you may notice
- Hybrid or battery system warning
- Reduced electric power or range
- Functions supplied by the affected battery switched off
- Likely causes
- PossibleSoftware of battery module C not matching the vehicle controller
- PossibleFaulty cell or temperature sensing inside the pack section managed by C
- RareBus wiring, connector or 12 V supply fault at module C
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €80 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.