Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Engine Coolant Temperature Sensor: Inspection
- INSPECT ENGINE COOLANT TEMPERATURE SENSOR
- Partially insert the sensor into the water and warm up the water.
- Measure the resistance between the terminals.
Standard resistance
SPECIFIED CONDITION CHARTCondition Specified Condition Approx. 20°C (68°F) 2.32 to 2.59 kΩ Approx. 80°C (176°F) 0.310 to 0.326 kΩ If the result is not as specified, replace the sensor.
NOTE: When checking the ECT sensor in the water, keep the terminals dry. After the check, wipe the sensor dry.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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