B3A46

Active Aerodynamic Feature B Position Sensor 2 Circuit High Voltage

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Resource management error message on dashboard
Incorrect operation of active aerodynamic elements (the spoiler does not extend)
The system can be forced to shutdown

Causes

Short circuit in wiring harness
Position sensor malfunction
Problems with the active aerodynamics control module
Oxidized contacts in connectors

How to Fix

Check the voltage in the sensor circuit (should not exceed 5V)
Inspect the wiring harness for damage
Check the resistance of the position sensor
Clean connector contacts
If necessary, replace the sensor or repair the harness

Related codes

B3A45 B3A47 U0121