focus temp gauge?

My 1.6 focus temp goes into the red when ever the car goes over 70 mph or is driven hard. Have flushed coolant out - fitted new water pump and stat. Fitted new cht sensor, new dash and ecu. Car does not overheat or lose water. Fault never occurs while car is stationery, even if revved hard for long periods. My obd scanner shows engine coolant temp hovers between 116-121 degrees, even with cooling fans on.No way is engine that hot. Idea`s?