279A00 är ett fel som lagrats i din BMW:s minne (en ISTA-felkod, inte en standard OBD-II P-kod).
Vad det betyder: Active cooling air flap (radiator shutter): communication error between the engine ECU (DDE) and the flap actuator over the LIN bus. The shutter that regulates airflow through the grille isn't reporting back. Usual cause: LIN wiring/connector or the flap actuator.
