U028D

Lost Communication with Active Aerodynamic Feature Control Module A

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

Error message on the dashboard
Active aerodynamic elements do not work
Possible deterioration in handling at high speeds
The Check Engine light comes on

Causes

Open or short circuit in the communication circuit
Problems with power supply to the aerodynamics module
Malfunction of the active aerodynamics control module
Connector problems or contact corrosion
Engine control unit malfunction

How to Fix

Check the integrity of the wiring harness to the aerodynamics module
Check fuses and relays associated with the system
Diagnose the active aerodynamics control module
Check connections and connector contacts
If necessary, replace the control module

Related codes

U028C U028E U029D