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 EFI. ENGINE COOLANT TEMPERATURE SENSOR
- Check the resistance.
- Using an ohmmeter, measure the resistance between the terminal.
Resistance
RESISTANCE SPECIFICATIONSTester Connection Specified Condition 1 (E2) - 2 (THW) 2.32 to 2.59 kΩ at 20°C (68°F) 1 (E2) - 2 (THW) 0.310 to 0.326 kΩ at 20°C (68°F) NOTE: If checking the engine coolant temperature sensor in water, be careful not to allow water to intrude into the terminals. After checking, wipe up water on the engine coolant temperature sensor.If the result is not as specified, replace the engine coolant temperature sensor.
- Using an ohmmeter, measure the resistance between the terminal.
- Check the resistance.
Use the Manual With the Right Hardware
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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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