U025BLost Communication With Special Purpose Vehicle Control Module C
- Generic OBD-II code · Network
- How the car detects it
- With U025B a module on the bus reports that controller C (third slot of four) has gone quiet. No manufacturer documents this code publicly. Ford's body builder bulletin for its 2023 Super Duty shows a pitfall that applies to all slots: the Upfitter Integration System module only cooperates with the programming tool when it, the SYNC module and the body control module carry matching software, and trucks built before 12 June 2023 need a reflash first. A partly updated set can therefore leave an add-on unit unanswered. The Audi patent on configurable conversion modules adds that such units may hang on CAN, LIN or other links, so the missing node is not always on the main bus. Check software levels and the conversion paperwork before replacing hardware. Base vehicle functions normally remain; U055C means corrupt data.
- What you may notice
- Conversion functions of unit C inoperative
- Programming or configuration tool cannot reach the unit
- Likely causes
- LikelySoftware of vehicle modules and add-on unit not at matching levels
- PossibleController C without power or ground from the upfit circuits
- PossibleFault on the sub-bus or link through which the unit is attached
- RareInternal failure of controller C
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.