U0255Lost Communication With Front Display Interface Module
- Generic OBD-II code · Network
- How the car detects it
- The front display interface module is the central screen in the dashboard. Ford calls it FDIM; in the U-code table of the 2011 Saab 9-5, a GM design, the same node is the info display module with U0255. GM also shows the code inside a wider network failure: on 2017 Silverado, Sierra, Tahoe, Suburban, Yukon and Escalade, the serial data gateway (SDGM) could lock up while still powered, or its X1/X2 terminals lost tension, and U0255 then appeared among many U codes together with dead gauges, a blank radio display or even no crank. The first step was pulling the gateway fuse for one minute, with gateway software to follow (PIT5586G). So when U0255 shows up with a dozen siblings, the gateway or a shared branch is the suspect, not the screen. A dead display alone points to its own supply. Combined units use U0257.
- What you may notice
- Central screen black or frozen
- Audio, climate or vehicle settings cannot be shown or changed
- With gateway faults also dead gauges, warning messages or no crank
- Likely causes
- LikelyGateway module locked up or its connector terminals loose, many U codes at once (GM SDGM)
- PossibleDisplay without power or ground (fuse, connector behind the screen)
- PossibleDamaged bus wiring to the display after dashboard work
- RareInternal failure of the display module
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €1,100
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.