2006-2009 Range Rover Sport
I don't know how many senders there are and where they are located without poking around, but I'm guessing there is one for the temp gauge, ECU, driver's rectal temp and probably 42 other places in this vehicle . Its possible the temp gauge sender was acting up esp if the coolant hose was hot and the temp gauge was indicating cold. Or maybe the thermostat was stuck open and the engine just ran colder longer. On modern cars the thermostat usually opens @190F to direct coolant to the radiator. Until then you should notice a steady rise in the temp gauge while the coolant bypasses the radiator. Next time the temp gauge doesn't move check the temp of the coolant hose near the top of the radiator with your hand.