D91DFD on BMW:si muistiin tallennettu vika (ISTA-vikakoodi, ei vakiomuotoinen OBD-II P-koodi).
Mitä se tarkoittaa: Missing 'status, exterior lights, front electronics 2, right' message — receiver FRM/body module, transmitter LHMR (right headlight module). A loss of communication with the right front lighting; typical causes are connector corrosion/moisture or a faulty headlight module.
