it goes out and your heat will be gon
Is you Geo Tracker overheating or the temperature is running almost hot then you need to change you thermostat
If your radiator isnt leaking and car is having a over heating problem and coolant spewing out. Chances are your thermostat needs replaced. possible the radiator needs to be flushed. But more likley its thermostat
Well, I know when a tire on my car needs to be replaced when there is no tread left on it. What are YOU referring to
The themostat is located in the top rad hose on the engine side, but I don't know about the sensor. In my 91 the coolant temp sensor is in the thermostat housing and the engine temp sensor is on the block.
Some of these fans will not engage until the heat sensor gets to a certain temperature. The engine needs to be hot for the fan to come on.
code 22 needs (engine coolant temperature sensor replaced) don't know about the 25
it should be replaced when it stops doing its job controlling the temperature and replacing the battery does not solve the problem or it is showing a digital error code that tells you it is defective. You may also want to test if it actually is doing its job but the heating or cooling unit may be broken. If you have more than one zone and you know what you are doing, you can switch it with a known working thermostat and see if the problem stays with the zone or it moves with the thermostat. That should tell you if the thermostat is broken or the system related to that zone needs maintenance.
To check if a speed sensor is bad. Pull the sensor and connect your ohm (resistance) meter probes to the two terminals of the speed sensor. There needs to be 7 or more pulses of zero resistance, and the resistance between needs to be infinite. There are 2 speed sensors, an input and output. I had this happen once, and to put it real simply, your speedometer won't work anymore.
The speed sensor may be built into the hub bearing. In that case the whole hub bearing needs to be replaced.
Overheating or no heat from the heater are sure signs it is bad. You car is 12 years old, just replace it if you have a suspicion it is bad. You can test the thermostat but why bother? You will have to remove it to perform the test. Just replace it.
It is the two wire sensor screwed in next to the thermostat housing.
Two symptoms of faulty thermostat which would more than likely require replacement of same: (1) engine overheats quickly (2) engine takes too long or doesn't reach normal operating temperature