GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Holden 🢒 2008 🢒 Captiva 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Engine Coolant Temperature Sensor Replacement

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1804742 Size: SH

    Caution: To avoid being burned, do not remove the radiator cap or surge tank cap while the engine is hot. The cooling system will release scalding fluid and steam under pressure if radiator cap or surge tank cap is removed while the engine and radiator are still hot.

  1. Disconnect the negative battery cable.
  2. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  3. Allow the engine to cool to ambient temperature less than 50°C, and slowly remove coolant filler cap.
  4. Drain approximately two liters of coolant into a suitable container.
  5. Disconnect the wiring harness connector (1) from the ECT sensor (2).

    6. Object Number: 1801443 Size: SH

    Important:  Clean the area around the ECT before removal to avoid debris from entering the engine. If coolant leaks from the cylinder head as the sensor is removed, screw the sensor back into the cylinder head and drain more coolant from the cooling system.

  6. Remove the ECT sensor (1).

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1801443 Size: SH
  1. Install the ECT sensor (1).

    2. Tighten
    Tighten the engine coolant temperature sensor to 22 N·m (16 lb ft).

  2. Connect the ECT sensor connector.
  3. Connect the negative battery cable.
  4. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  5. Refill the cooling system. Refer to Engine Cooling System Specifications .