Thermostat is sticking.
It is for the Temperature gauge, it feels more balanced than being either side of the middle
A temperature gauge, that always read the maximum temperature, is usually not connected to the temperature sensor. The wire between the gauge and the sensor must be broken.
get a new temperature sensor.
If the gauge is reading hot and the car is running normal temperatures, the water temperature sensor needs replaced.
could be the temperature sending unit
Test gauge function with a mechanical gauge to get actual engine temp.
StUck in open position
stop
Is vehicle actually overheating? Could be a bad temperature sending unit or gauge Check temperature with a thermometer If thermostat does not open vehicle will overheat
Your check gauge light comes on if : your coolant temperature guage shows the temperature is high your oil pressure gauge shows the oil pressure is low or your fuel gauge shows the fuel tank is near empty
check the antifreeze
replace the heater temperature switch