Got a slight problem I'm hoping you can help me with. Before I did the thermostat change I was getting this message randomly, sometimes it comes on and not always comes on when I switch off. The tank on the left hand side of the radiator was full to the top of the transparent part so didn't think anything of it.
Fast forward to today and I've replaced the thermostat, top and bottom hose and coolant. I've bled the system, with the car running and heater on and again the coolant is to the top of the transparent part and the message still comes on!
Is there something I've missed or is my sensor knackered?