Coolant level warning light ....

[mefyj]

My coolant level warning light has been coming on nearly at every cold start. (No it's not low and have never had an overheating issue). The light comes on after the engine has been running for a few minutes. It stays on for maybe 30 or 40 seconds and then goes off. One time it just flashed a few time and off.
I suspect a loose connection... but why does it go on and then off again?
Anyone else had this trouble?

 

[Coyote machine]

I'm not certain as to where the sensor is located, but whether it is in the actual radiator or in the overflow tank check to see if there is a bare wire touching metal or two wires touching each other. If not, then it may just be a bad sensor; which could also be located in the engine head.