B3A3F — Active Aerodynamic Feature B Actuator Position Sensor Not Learned

B3A3F: Active Aerodynamic Feature B Actuator Position Sensor Not Learned — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Active Aerodynamic Feature B Actuator Position Sensor Not Learned. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Body

Also written as: B3A3F-00, B3A3F00 (some scan tools add the fault-type byte, e.g. -00).