30C500 är ett fel som lagrats i din BMW:s minne (en ISTA-felkod, inte en standard OBD-II P-kod).
Vad det betyder: Active grille shutters / radiator blind stuck or restricted (intermittent, plausibility: blocking). The shutters don't open/close properly, affecting engine-temperature regulation and aerodynamics. Causes: debris/leaves/ice in the mechanism, failed shutter actuator motor, bent louvres after a front-end knock, wiring/connector issues.
