U025DLost Communication With Front Controls Interface Module B
- Generic OBD-II code · Network
- How the car detects it
- Front controls interface module B is a second switch panel at the front where the controls are split over two units. Ford uses this name (FCIMB): on 2023 Transit vans having SYNC 3 Lite and parking aid at the rear only, the parking aid disable switch sits in that panel, and vans built between 15 March and 2 June 2023 ignored it, since the park aid module carried a wrong configuration (SSM 51837). Mercedes fills the code differently: in its 8G-DCT transmission controller (724.1, models 118, 177 and 247) U025D00 means faulty communication with the head unit (LI27.00-P-077141). The module behind U025D therefore depends on the maker, and the description in the scan tool decides. A real loss disables the keys on the second panel or, at Mercedes, data from the head unit; panel A is U0256, corrupt data from B are U055E.
- What you may notice
- Switches on the second front panel without function
- Functions that rely on head unit data unavailable (Mercedes)
- Likely causes
- LikelySecond panel without power or ground, or connector loose after dashboard work
- PossibleHead unit not on the bus where the maker maps U025D to it (Mercedes)
- PossibleWrong configuration of the panel or of the module that uses its switches
- RareInternal failure of the second control panel
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.