B3A49 — Active Aerodynamic Feature C Actuator Position Sensor Not Learned

B3A49: Active Aerodynamic Feature C 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 C Actuator Position Sensor Not Learned. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Body

Also written as: B3A49-00, B3A4900 (some scan tools add the fault-type byte, e.g. -00).