U028ELost Communication With Active Aerodynamic Feature Control Module B
- Generic OBD-II code · Network
- How the car detects it
- U028E concerns a second aerodynamic control module, B, on vehicles that drive more than one active element or split one element into separately controlled halves. Ford's F-150 is a practical example of the latter: its active air dam has a left and a right actuator whose firmware Ford blamed for C0604 logged by the PCM (SSM 51718), and bulletin 24-2404 and its successors cure the warning Active Air Dam System Fault See Manual and code C0604 with coordinated software updates. Neither Ford nor any other maker publishes U028E or assigns letter B to a specific part. If B drops off the bus while A still works, the elements can end up in unequal positions, and the system usually parks both and shows a warning. CARB treats such features as active off-cycle technology with tracked usage.
- What you may notice
- Active aero or air dam warning in the cluster
- One side of an element stuck or misaligned
- Likely causes
- LikelyWiring or connector of module B damaged near the moving element
- PossibleOutdated software in module B or the commanding controller
- PossibleSupply or ground of module B interrupted
- RareModule B internally failed
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.