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Where is the temperature switch on a car?

The temperature switch on a car is typically located on the engine block or cylinder head, near the thermostat housing. This switch is responsible for monitoring the engine's coolant temperature and providing feedback to the vehicle's computer system to regulate the engine's temperature.


Understanding the Role of the Temperature Switch


The temperature switch, also known as the coolant temperature sensor or engine coolant temperature (ECT) sensor, is a crucial component in a car's cooling system. It measures the temperature of the engine's coolant and sends this information to the vehicle's electronic control unit (ECU). The ECU then uses this data to adjust various engine functions, such as fuel injection, ignition timing, and the operation of the cooling fan, to maintain the optimal engine temperature.


Locating the Temperature Switch


The temperature switch is usually located on the engine block or cylinder head, near the thermostat housing. This position allows the sensor to accurately measure the temperature of the coolant as it circulates through the engine. The specific location may vary depending on the make and model of the vehicle, so it's essential to consult your car's service manual or a professional mechanic for the exact location.


Symptoms of a Malfunctioning Temperature Switch



  • Overheating engine: If the temperature switch is not functioning correctly, it may not detect the rising coolant temperature, leading to an overheating engine.

  • Poor fuel economy: A faulty temperature switch can cause the engine to run inefficiently, resulting in decreased fuel economy.

  • Check engine light: The vehicle's onboard diagnostics system may detect an issue with the temperature switch, triggering the check engine light on the dashboard.


If you suspect a problem with your car's temperature switch, it's essential to have it inspected and replaced by a qualified mechanic to ensure the proper functioning of your vehicle's cooling system.

How do I know if my temperature switch is bad?


If you notice that your engine overheats, the coolant temperature sensor could be the problem. At times, the coolant temperature switch may fail such that it starts transmitting hot signals permanently. This causes the computer to erroneously counterbalance the signal, thereby causing the engine to misfire or overheat.



Where is the temperature sensor on a car dashboard?


From the road surface. Asphalt is an excellent absorber of the sun's rays which makes the surface of the road very hot have you ever walked Barefoot on asphalt on a sunny day during summer.



Can I drive my car with the temperature light on?


It's not advisable to keep driving if the red coolant temperature warning light is on. Doing so can cause significant damage to your engine, leading to costly repairs. If the blue light is on, you can continue driving but avoid heavy acceleration until the engine warms up.



What is the temperature button on my car?


Temperature Control
This button allows you to set the preferred temperature for your driving comfort. Depending on your make and model, the temperature control can be adjusted by either an up or down button, digital touch control, or a dial that turns from blue (cold) to red (hot).



What happens if you drive with a bad temperature sensor?


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.



How much does it cost to replace a temperature switch?


The average cost for an Engine Coolant Temperature Sensor Replacement is between $406 and $448. Labor costs are estimated between $97 and $122 while parts are priced between $309 and $325. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.



Where is temperature switch located?


The coolant temperature sensor will be located directly behind the coolant pipe. In most modern cars and vehicles, this is present behind the right cylinder head that is located right underneath the air intake pipe. Will a malfunctioning Coolant Temperature Sensor cause a check engine light?



What happens when the temperature sensor goes out?


While sometimes a faulty sensor sends a permanent cold signal to the engine, it can also send a permanent hot signal. The computer will again miscalculate the signal and cause the engine to heat up instead of cooling it down. When this happens, the car might misfire, or it could lead to engine knocking.



How do I fix the temperature warning on my car?


How to Fix the Engine Coolant Temperature Warning Light?

  1. Stop the Vehicle Safely.
  2. Check Coolant Levels.
  3. Inspect for Leaks.
  4. Test the Thermostat.
  5. Examine the Water Pump.
  6. Inspect the Radiator.
  7. Use a Diagnostic Tool.



What is the temperature switch on a car?


The coolant temperature sensor (CTS) can be found somewhere near the engine thermostat, which allows it to function optimally. The tip of the CTS is probably located right next to the engine coolant. The sensor works by measuring the temperature that's being given off by the thermostat and/or the coolant itself.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.