[kenazaki]

Hi I have just picked my 2014 F10 M5 up from my dealer after it had it's major service done and had a new wiring loom put in the nearside rear door ( UK model) on the trip home the engine warning light came on . I checked the vehicle status there aren't any faults showing. When I called the dealer they had closed so I can't contact them till the morning. I tried turning the car off then back on again but the light has stayed on . Does anyone have any ideas what could be causing the light to come on.