The problem could be a dirty sensor or the sender is no good.
why doesn't my rpm gauge and temp gauge, fuel gauge not work
only 3 reasons a temp gauge wont work the temp sender is bad the gauge is bad or the wire from temp sender to gauge is broken
Your temp gauge is a very simple circuit with few things to go wrong. Your temp sensor may be bad, the gauge maybe bad, or the connecting path may be bad. Sometimes if you have taken the gauge pack out, it does not seat right when it is reinstalled. The connection inside the dash is all pressure and prayer.
Your overheating!!! try adding water to your cooling system. if that doesnt work it could be your radiator, water pump, or thermostat that is sticking!!!
change your thermostat....
THE temp sending unit 4 the inside gauge usally has 1 wire & the sending unit 4 the Computer has 2 wires.
If the temp gauge no longer works then either the gauge itself has failed, the sending unit has failed, or there is a problem in the circuitry.
could be a bad sensor a bad gauge or a broken or disconnected wire
your driver side fan should come on at about 220 degrees which is about 3/4 way up the temp gauge and the passenger side comes on only when the ac compressor is turned on, if ur ac doesnt work then neither does ur passenger fan, if ur temp isin red and ur driver side fan doesnt come on then check your relays if ur relays are good then change ur coolant temp sensor and if that doesnt work then ur fan motor is most likely burnt out
that is rather unusual i would ask the dealership you brought it from and ask them and then go from there. Some vehicles have two temp sending units, one for the temp gauge and one for the ecm. The one for the gauge generally has one wire going to it, the one for the ecm may have two wires going to it.
Cause it doesn't have one