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.
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
2001 Chevrolet Lumina V6-3.1L VIN JSECTION Service and Repair
REMOVAL PROCEDURE
1. Turn OFF the Ignition.
2. Relieve coolant pressure.
3. Loosen the 2 air intake duct clamps and remove the air intake duct.
4. Disconnect the ECT sensor electrical connector.
5. Using a deep well socket and extension, remove the sensor.
INSTALLATION PROCEDURE
1. Coat engine coolant temperature sensor threads with sealer P/N 9985253 or equivalent.
NOTE: Refer to Fastener Notice in Cautions and Notices.
2. Install the sensor in the engine.
Tighten
Tighten the sensor to 23 Nm (17 lb ft).
3. Connect the ECT sensor electrical connector.
4. Reinstall the air intake duct and tighten the 2 air intake duct clamps.
5. Stan the engine.
6. Check for leaks.
7. Check the coolant level.
RENDER: 1.0x
NO RELATED
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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.