Hi, I have a zantia 2.0i auto, the car is an exclusive model fitted with the sport mode and snow overide buttons, if I am in traffic at about 40mph sometimes the sport mode and snow lights on the dash flash together and the gearbox stays in a middle range gear and wont go into top. I can pull up, switch of and restart and things are back to normal I have a feeling this may be an electrical problem, can anyone help?