U0557Invalid Data Received From Front Controls Interface Module A
- Generic OBD-II code · Network
- How the car detects it
- Front controls interface module A is the button panel in the center stack that reads keys and knobs for audio and climate and passes them on as bus messages; Ford calls it FCIM, GM the infotainment faceplate control module (Saab 9-5 2011, U0256). Ford shows how much depends on it: on 2015–2017 F-150 trucks heavy CAN traffic could freeze the FCIM, so A/C, radio and even window switch control failed intermittently with U0140, U0155, U0253, U0401 or U0452 in the FCIM; a battery reset and FCIM self-test came before any replacement (SSM 46902). U0557 stands for panel frames that arrive with invalid content, U0256 for absent ones, U055E for the second panel B. No bulletin cites U0557. Button presses may be ignored or trigger the wrong function.
- What you may notice
- Radio or climate buttons work only intermittently or not at all
- Several warning lamps or messages appear together with the button failure
- Likely causes
- PossibleControl panel electronics locking up under high bus load
- PossibleControl panel software fault or mismatch with the infotainment unit
- RareStuck button or liquid spilled into the panel producing invalid key states
- RareFront controls interface module A internally faulty
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.