B3A3A: Active Aerodynamic Feature A Position Sensor 1 Circuit High Voltage — what it means, the affected system and what to check before replacing parts.
Active Aerodynamic Feature A Position Sensor 1 Circuit High Voltage. Source catalogue definition; confirm applicability using vehicle service information.
Affected system: Body
Also written as: B3A3A-00, B3A3A00 (some scan tools add the fault-type byte, e.g. -00).