B3A4F

Active Aerodynamic Feature C 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 active aerodynamic elements
Malfunction indicator light comes on
Reduced aerodynamic efficiency at high speeds

Causes

Open or short circuit in wiring harness
Position sensor malfunction
Power or grounding problems
Control unit malfunction

How to Fix

Check the wiring harness for damage
Check the voltage at the sensor
Replace position sensor if necessary
Check and restore power and grounding
Scan the control unit for other errors

Related codes

B3A4E B3A50 B3A51