B3A4A

Active Aerodynamic Feature C Actuator Temperature Not Plausible

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–222 (est.)

Symptoms

Incorrect operation of active aerodynamic elements
Error message on the dashboard
Reduced aerodynamic efficiency at high speeds

Causes

Actuator temperature sensor malfunction
Open or short circuit in wiring harness
Problems with the actuator solenoid valve
Mechanical fault of the actuator
Software error in the control module

How to Fix

Check the wiring harness and connections to the actuator
Test the actuator temperature sensor
Check the operation of the solenoid valve
Inspect the mechanical part of the actuator for damage
If necessary, replace faulty components
Update control module software

Related codes

B3A49 B3A4B U0121