How much resistance should a coolant temp sensor have?
You should have a reading of approximately 2000 ohms. Check the warm sensor in your engine. You should see a much lower reading on the ohm meter. If not, then it is not working correctly.
Why is my temperature gauge going up and down?
Q: What does it mean when your temperature gauge goes up and down? This simply means that your engine is overheated. An overheated engine can be caused by several factors. These factors may include leakage in the coolant level, a clogged radiator hose, a defective thermostat, a bad water pump, and failed radiator fan.
What should the temp of the coolant sensor be?
Check that the temperature value of the CTS is around 80-90c when the engine is hot. A lot of engine coolant temperature sensors have two wires and the sensor is controlled by Ohm. Get a wiring diagram and find out what ohms you should have at a specific temperature to check the function.
How can I find out what my engine coolant temperature is?
The best place to start in comparing your vehicle’s normal engine coolant temperature to see if it’s correct is with your thermostat setting. If you call your local auto parts store, like one of our partners below, they will be able to tell you what temperature your engine’s thermostat is designed to start opening.
Why does my car have a coolant temperature gauge?
Almost every vehicle sold in the US has a temperature gauge installed to make sure the driver has the opportunity to keep an eye on coolant temperatures. As vehicles and their engine control computers have gotten more advanced, the computer even tracks coolant temperatures and will set an engine code if the temperature gets too high.
Can a bad coolant sensor cause a car to not start?
Some cars use the engine coolant temperature sensor to control the electric cooling fans. You have two separate temperature sensors for the fans, dashboard gauge, and engine management in most cars. However, if your car has a single sensor, a bad engine coolant temperature sensor may result in your fans won’t start at all.
Check that the temperature value of the CTS is around 80-90c when the engine is hot. A lot of engine coolant temperature sensors have two wires and the sensor is controlled by Ohm. Get a wiring diagram and find out what ohms you should have at a specific temperature to check the function.
The best place to start in comparing your vehicle’s normal engine coolant temperature to see if it’s correct is with your thermostat setting. If you call your local auto parts store, like one of our partners below, they will be able to tell you what temperature your engine’s thermostat is designed to start opening.
How is coolant temperature determined in an ECM?
The ECM has an engine coolant temperature sensor mounted in the engine that alters the resistance to determine coolant temperature.
Almost every vehicle sold in the US has a temperature gauge installed to make sure the driver has the opportunity to keep an eye on coolant temperatures. As vehicles and their engine control computers have gotten more advanced, the computer even tracks coolant temperatures and will set an engine code if the temperature gets too high.