So recently whenever whenever im on the highway and travelling at speeds of 140km/hr or more i get a message on the dash saying ' Engine System Fault'. After that the car does not even accelerate properly. Even if i floor it it will take ages for it to go from 100 to 120. The engine check light does not come one either. If i stop, turn the ignition off and then turn it back on the problem goes away. I took it to the dealer but they said that they do not know what is going on since the car is not storing any 'error codes'. Does anyone know what the problem might be? Any help will be appreciated. Thanks