B3A4A — Active Aerodynamic Feature C Actuator Temperature Not Plausible

B3A4A: Active Aerodynamic Feature C Actuator Temperature Not Plausible — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Active Aerodynamic Feature C Actuator Temperature Not Plausible. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Body

Also written as: B3A4A-00, B3A4A00 (some scan tools add the fault-type byte, e.g. -00).