B3A47

Active Aerodynamic Feature B Position Sensor 2 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

Position sensor malfunction
Open or short circuit in wiring harness
Poor contact in connectors
Sensor power problems

How to Fix

Check the integrity of the wiring harness to the sensor
Check the contacts in the sensor connectors
Measure the sensor supply voltage
Check sensor resistance
Replace sensor if necessary

Related codes

B3A46 B3A48 B3A49