B3A3B

Active Aerodynamic Feature A Position Sensor 1 Circuit Low Voltage

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Incorrect operation of the active aerodynamic element
The warning lamp on the instrument panel lights up
Reduced aerodynamic efficiency at high speeds

Causes

Position sensor malfunction
Broken or damaged wiring harness
Contact corrosion
Problems with the control unit
Low voltage in the on-board network

How to Fix

Check the condition of the sensor and its connection
Scan the wiring harness for damage
Check contacts for oxidation
Check the voltage in the sensor circuit
If necessary, replace the sensor or repair the wiring harness

Related codes

B3A3A B3A3C B3A3D