Really getting fed up with my Alfa gtv v6 imobiliser cutting in. Second time now, changed the battery after the first time it happened and all well until today, and now it's cut in again. The only thing I did on both occasions was open the cars passenger door with the key first. I open the door with the key because I've lost the fob to the central locking. Can anyone shed some light on this problem. Could it be something to do with the passenger door lock ???