U028FLost Communication With Active Aerodynamic Feature Control Module C
- Generic OBD-II code · Network
- How the car detects it
- A third aerodynamic control module, C, is found on vehicles that combine front elements with rear ones such as a deployable spoiler or an adjustable wing. Sports cars show what these rear parts do: the 2017–2019 Ford GT raises and lowers an active aero wing, and Ford's bulletin 20-2353 deals with that wing touching the body after long storage in its lowered position. U028F is stored when the network loses module C altogether, so the element neither reports its position nor accepts commands. No manufacturer documents U028F or links letter C to a particular element. A wing that stays down reduces downforce at speed, one that stays up adds drag. CARB counts movable aero parts among the off-cycle technologies with logged operating time.
- What you may notice
- Spoiler or wing no longer moves
- Active aero fault message, sometimes a speed limitation
- Likely causes
- LikelyWiring chafed or broken at the moving rear element
- PossibleMoisture in the connector of module C
- PossibleFuse, supply or ground of module C faulty
- RareModule C internally failed
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €2,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.