Make sure the connector to the Coolant Sensor is not corroded. If so replace with a new connector
fan clutch?
Poor coolant circulation in the cooling system.
You probably have a cracked head gasket!!!!! You probably have a cracked head gasket!!!!! Check coolant to see if there is oil in the coolant this will prove it or if you have foam in coolant overflow check coolant resevior cap
it is probably your water pump
had the same problem with a sibring,took to the garage,they replaced the thermostat and gasket and found a hairline crack in the thermostat housing they replaced the housing and everything was fine then
Check the timing.
have you checked the fan
Low coolant? Cooling fans not working? Water pump not circulating coolant? Radiator plugged or restricted?
did you use the right anti-freeze or you may have a bad fan/fan switch
Check coolant level Perhaps thermostat is not opening to allow coolant to flow
takes the heat away from engine low coolant??
You could be leaking coolant, your blower fan might not be working, etc.