Check for "fog" or smells coming from the heater core, indicating a heater core leak. Check the oil for a milky color in case coolant is leaking into the oil. If these areas are ok, then perform a pressure test on the cylinders, as there is probably a blown head gasket allowing coolant to leak into the cylinder and be lost through the exhaust.
Bad thermostat, water pump not circulating, low coolant level, head gasket leak.
replace the sensor.
Low coolant, inoperative water pump, head gasket failure, inoperative radiator fan, etc.
The causes include low coolant, inoperative radiator fan, serpentine belt, water pump, head gasket.
Low coolant level.
when u have low coolant
Normal causes are low coolant and an inoperative radiator fan.Normal causes are low coolant and an inoperative radiator fan.
Low coolant? Bad sensor?
Low coolant
fire=hot
The heater coil probably has a leak causing steam and vaporized antifreeze to be released into the vents. Is it using coolant?
thought is a pure mystery.