The engine coolant temperature sensor is an electronic sensor used to measure the temperature of the coolant inside the engine and send data to the electronic control unit (ECU). It is a vital component that ensures efficient engine operation and protects it from overheating.
Temperature sensor specifications:
Country of Origin: Korea
Product Brand: Hyundai
Product Number: 39220-2J100
Compatible models: Hyundai Elantra (2020-2024)
Hyundai Creta (2020-2024)
Hyundai Tucson (2024)
✅ Main function:
- Coolant temperature measurement.
- Sending the signal to the car's computer (ECU):
- To adjust fuel injection timing.
- To control the operation of the radiator fan.
- To determine the engine condition (cold or hot).
- Turn on the temperature light on the dashboard if the temperature rises.
⚙️ Technical characteristics: Installation:
- It is usually mounted on the engine head or near the thermostat within the coolant passage.
- Type:
- Thermistor.
- It changes its resistance depending on the temperature.
- Contact:
- Two- or three-pin electrical connector.
🔧 Symptoms of a damaged engine water temperature sensor:
- Incorrect engine temperature reading on gauge.
- The cooling fan is not running or is constantly running.
- Engine running with difficulty, especially when cold.
- Increased fuel consumption.
- The Check Engine light appears on the dashboard.
🛠️ Benefits when replacing it:
- Precise engine performance depending on its temperature.
- Reduce fuel consumption.
- Prevent engine overheating.
- Improve fan operation and cooling.
- Avoid sudden breakdowns caused by heat.
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