B3A45

Active Aerodynamic Feature B 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

Causes

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

How to Fix

Check the integrity of the wiring harness
Check voltage and grounding in the sensor circuit
Test position sensor
Replace sensor or wiring harness if necessary
Reset the error and check the system operation

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