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.
2005 Pontiac Vibe FWD L4-1.8L VIN 8FACTORY OEM SERVICE PROCEDURE
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
ENGINE COOLANT TEMPERATURE (ECT) SENSOR REPLACEMENT
REMOVAL PROCEDURE
IMPORTANT: Use care when handling the engine coolant temperature (ECT) sensor. Damage to the ECT sensor will affect proper operation of the fuel injection system.
1. Drain the engine coolant. Refer to Draining and Filling Cooling System in Cooling System.
2. Disconnect the ECT sensor electrical connector (1) from the ECT sensor (2) located next to the upper radiator hose on the cylinder head.
3. Remove the ECT sensor (2) from the cylinder head.
INSTALLATION PROCEDURE
1. Install the ECT sensor (2) into cylinder head.
NOTE: Refer to Component Fastener Tightening Notice in Service Precautions.
Tighten the ECT sensor to 20 N.m (14 lb ft).
2. Connect the ECT sensor electrical connector (1).
3. Refill the engine coolant. Refer to Draining and Filling Cooling System in Cooling System.
Factory Service Tools
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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