B3A43

Active Aerodynamic Feature B Position Not Plausible

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$111–333 (est.)

Symptoms

Error message on the dashboard
Check Engine light comes on
The active aerodynamic element does not move or does not work correctly

Causes

Aerodynamic element mechanism jamming
Position sensor malfunction
Open or short circuit in control circuit
Problems with the control unit
ECU software error

How to Fix

System diagnostics using an OBD-II scanner
Checking the aerodynamic element mechanism for free movement
Checking the status of the position sensor
Checking the integrity of the wiring harness and contacts
Resetting the error and re-diagnosis
Replacement of faulty components if necessary

Related codes

B3A42 B3A44 B3A45