U020ALost Communication With Moveable Roof Control Module B
- Generic OBD-II code · Network
- How the car detects it
- U020A stands for moveable roof control module B, a second roof unit beside module A (U0207); which drive it controls, for instance a separate sunshade or a further glass panel, depends on the maker. No manufacturer documents this code publicly. Related service experience comes from roof modules in general: Kia service action SA595 (bulletin 363, 2025 K4) updates the roof control module because a software logic error left the sunroof unable to open or close, and the update contains a reset of the module for sunroof initialisation. Power roofs usually need such a re-learn after a power loss or module replacement before they travel fully again. Invalid data from unit B is U050B. No MIL.
- What you may notice
- Second roof panel or sunshade does not move
- Roof stops halfway or needs repeated button presses
- Likely causes
- PossibleRoof module software or missing initialisation
- PossibleWet or corroded connector in the headliner
- PossibleFuse or ground of roof module B
- RareRoof module B faulty
- 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.