What does it mean when your temperature gauge is not moving?
The most common reason your temperature gauge staying on cold is a faulty coolant temperature sensor. It can also be caused by bad wirings between the cluster or the sensor. In some cases, it can also be a stuck thermostat causing the engine not to heat up properly. via
How do I reset my temp gauge? (video)
How do I know if my thermostat or water pump is bad?
What causes temperature gauge to go up?
If the temperature gauge reads high, it could mean your engine is overheating. Another reason your reading might be high is you could be losing coolant. A small leak or evaporation may cause your radiator to slowly lose coolant. A third reason your temperature gauge reads high could be because the thermostat is broken. via
How do you check a temperature gauge? (video)
How do you fix a coolant temperature sensor? (video)
What can a faulty coolant temp sensor do?
If the coolant temperature sensor malfunctions, it could cause your car engine to get overheated. While sometimes a faulty sensor sends a permanent cold signal to the engine, it can also send a permanent hot signal. via
Can you clean a coolant temperature sensor?
In most cases, sensors for your automobile will need to be replaced if they fail, but depending on the type of sensor and its location or function, some can be cleaned and reused. via
How do you calibrate a temperature sensor? (video)
What happens when the thermostat is stuck closed?
Your vehicle's thermostat opens to allow coolant to flow through the radiator and cool the engine down. However, if the thermostat gets stuck in the closed position, the coolant can't flow through the radiator and can make your engine overheat. via
How do I know if my water pump is circulating? (video)
How can I test my thermostat without removing it? (video)
What happens if the thermostat doesn't open?
A vehicle can run just fine if the thermostat doesn't open. It will run on the warm side, not past halfway, and heat the interior just fine. But, when the weather gets warmer outside that thermostat stuck closed will not be able to allow the reservoir water flow and the vehicle will begin to have overheating issues. via
Why is my truck running a little hot?
There are many possible reasons that your engine is running hot, including low coolant levels, a clogged or closed thermostat, a failed head gasket or a water pump malfunction. Today, an increasing number of new vehicles don't have temperature gauges. via
How do you diagnose overheating problems?
Why is my car overheating but it has coolant in it?
However, if your car is overheating, but the coolant is full, it is probably not a leak. Instead, it may be that it's having trouble circulating correctly. This can stem from several things, including a faulty water pump, a radiator blockage, a stuck thermostat, or a plugged heater core. via
Why is my car overheating if it has coolant?
In general, it's because something's wrong within the cooling system and heat isn't able to escape the engine compartment. The source of the issue could include a cooling system leak, faulty radiator fan, broken water pump, or clogged coolant hose. via
Will a temperature sensor cause a car not to start?
The sensor will not cause a no start. It could cause a hard start and a rich or lean condition only. via