U057CInvalid Data Received From Battery Charger Control Module D
- Generic OBD-II code · Network
- How the car detects it
- U057C covers the fourth charger slot. Large chargers are often built from parallel power modules: Hyundai's patent for a vehicle-mounted charger gives each module its own slave controller that reports to a master, which can drop to a single module once the battery reaches the constant-voltage phase. If the reports from unit D are implausible, the master cannot decide how to share current and stores U057C; a missing unit gives U027B instead. No manufacturer documents U057C or a fourth charger publicly. For plug-in hybrids CARB requires the OBD system to detect charger faults that block charging or limit the rate, but whether a lamp comes on is up to the maker. Expect reduced or interrupted AC charging.
- What you may notice
- Charging power lower than usual or charging stops
- Charging system warning
- Likely causes
- LikelyPower module or slave controller D faulty
- PossibleCharger software not matched across units
- RareOverheating of unit D due to coolant or fan problems, corrupting its status data
- 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.