Hi there this happened to me to, it mite be a fuse or relayor the temp sender unit on the inlet manifold. It may be a faulty gauge but it is more likely to be one of the other to. Hope that helps
i just put in a new radiator and now temperature gauge reads high but their are no leaks
1996 prelude temperature gauge reads low temp
Low Coolant or faulty gauge
you could have abad temp sensor
THere are 2. one for the gauge, and one that reads for the fan. the gauge one is located by the firewall, while the other is near the coolant thermostat housing.
You might plan to refuel when your fuel gauge reads one-eighth of a tank of gasoline. Some people choose to refuel when the gauge reads one-quarter of a tank remaining.
i have sort of the same problem on my dodge 2000 the temperature gauge recently went out and i replaced the sensor but the gauge always reads 0 your not alone with this one...
Ground the power wire and have someone watch the gauge. If it goes to full then the gauge is working. Clean the ground connection and turn the key on and if it reads then it is okay. If not then you have a bad sending unit.
If it reads hot after the vehicle has been standing overnight, it is dead and needs replacing.
That is the way it is designed. When the key is turned on then it reads correctly.
Temperature gauge reads signals off the coolant temperature sensor. It can also point to a faulty thermostat. If your car runs rough in cold, idles rough and uses up more fuel then coolant temperature sensor is your problem. They are normaly a cheap and easy diy to do.
It is easier and cheaper to replace the temperature sensor--try that first