My low coolant light comes on and has just recently started coming on, it happens everynow and then. I can cut the car off and it wont come back on for a day or so. now I did check the connections to the sensors they are good, I checked the fluid level its good I also checked for oil in the water and water in the oil there is none of the bad stuff. I also ran the blown head gasket test that checks for exhaust in your radiator and that was negative. I have a pi intake with the sensor tapped on the crossover, the only things I have not done was run a pressure test and change the cap or sensor, what should be my next move.