B3A2A: Active Aerodynamic Feature Control Module B Power Mode Circuit/Open — what it means, the affected system and what to check before replacing parts.
Active Aerodynamic Feature Control Module B Power Mode Circuit/Open. Source catalogue definition; confirm applicability using vehicle service information.
Affected system: Body
Also written as: B3A2A-00, B3A2A00 (some scan tools add the fault-type byte, e.g. -00).