U04BEInvalid Data Received From Battery Charger Control Module B
- Generic OBD-II code · Network
- How the car detects it
- U04BE is logged when a module receives data from battery charger control module B that it cannot accept. Charging hardware can come in more than one stage: the Audi e-tron, for example, was sold in Europe with 11 kW AC charging as standard and 22 kW as an option. Which unit counts as A or B is up to the maker. Polestar shows one assignment: on the Polestar 3 the control unit GCCC stores U01BB00, the lost-contact sibling for charger B, when the on-board AC charger GHCA has failed; AC charging then stops while DC charging still works, and the fix is a new GHCA. No maker documents U04BE itself. It is not emission-related; expect slow or no AC charging.
- What you may notice
- AC charging slow, interrupted or impossible
- DC fast charging usually still works
- Charging fault message
- Likely causes
- LikelyOn-board charger B internally faulty (Polestar 3 analogy, grid disturbances)
- PossibleCharger or charging-control software out of date
- RareBus wiring or plug at the charger damaged
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.