Could be,
low on coolant,
sticky thermostat,
No
low coolant and/or radiator leak or maby a bad temp sensor low coolant and/or radiator leak or maby a bad temp sensor
why doesn't my rpm gauge and temp gauge, fuel gauge not work
1996 prelude temperature gauge reads low temp
temp gauge is stuck on hot
Idle the engine, remove the temp sensor wire on the engine and ground it. If the gauge does not move one can assume it has failed.
The temp sending unit may be unplugged or faulty.
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
7 for the instrument cluster 9 and 10 for highbeam headlamps.
I have 2001 G A Gt 119000 mi. had problems with over heating changed thermostat/and temp sensor now idols at 650 rpm for 45 mins temp always at 205 on gauge with no variations
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.
thermostat may be sticking and that cause the gauge to show hot, have it checked soon, you could be headed for bigger problems