Thermostat is sticking.
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.
could be the temperature sending unit
Unplug the coolant temp sensor and check what the gauge says...If it falls to cold, then the sensor is at fault. If it stays, then the gauge is either faulty or the contact points on the back of the gauges need to be cleaned... Unplug the coolant temp sensor and check what the gauge says...If it falls to cold, then the sensor is at fault. If it stays, then the gauge is either faulty or the contact points on the back of the gauges need to be cleaned...
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
Most likely cause is a failed engine thermostat.
A common cause is the thermostat being stuck in an open position.
Your car engine isn't getting up to the desired temperature, about 130 degrees Fahrenheit.
ect sensor bad
Not sure what you really mean but if temp of heat does not change = likely bad thermostat etc. If gauge does not work at all but heat is fine then gauge or electrical type problem to the gauge
I have same. It runs around the the first third 0f the gauge. It has tow package. I live in Utah and temp gauge stays same all year.