doors are all shut but on dash the doors open light/image flashes on and off as if it shorting?

ideas?

oh and the other prob i had with the what i think was amf sensor has now developed further.
i went to over take today a very slow driver and as i got beside it the car started the juddering hence no more speed then a light came on dash the triangle with swooping arrow and caution in it came on, in all gears as i slowly came home juddered at slight increase in acceraltion. should i b scared? damage maybe?
there is other probs but these i want to sort or put mind at easy the now