Coolant Temperature Sensor/Switch (For Computer): Service and Repair

Replacing the engine coolant temperature (ECT) sensor

Removing the engine coolant temperature (ECT) sensor





Preparations
- Remove the expansion tank cover.
- Open the valve on the right underside of the radiator. Use a hose to collect the coolant (cars with air conditioning (A/C): partially remove the splash guard under engine).
- Drain two liters of coolant.
- Close the valve.

Removing the thermostat housing cover
- Remove the cover over the fuel rail.
- Remove the upper camshaft cover, see Replacing the cover on top of the engine Service and Repair.
- Remove the thermostat housing cover (two screws). Move the cover to one side.

Removing the engine coolant temperature (ECT) sensor
- Remove the connector from the bracket.
- Disconnect the connector.
- Remove the engine coolant temperature (ECT) sensor. Remove the sealing ring.

Installing the engine coolant temperature (ECT) sensor




- Clean the mating surfaces.
- Install a new sealing ring on the engine coolant temperature (ECT) sensor.
- Install the engine coolant temperature (ECT) sensor. Tighten the engine coolant temperature (ECT) sensor to 10 Nm.
- Reconnect the connectors.
- Reinstall the connector on the bracket.

Installing the thermostat housing cover
- Clean the mating surfaces.
- Install a new gasket on the thermostat.
- Install the thermostat housing. Tighten the thermostat housing to 17 Nm.

Note! Refill the coolant. Run the engine to operating temperature. Top up as necessary. Function test. Check for leakage.

Check for leakage. Reinstall the fuel rail cover. Reinstall the upper camshaft cover, see Replacing the cover on top of the engine Service and Repair.
Connect the connector. Secure the connector on the bracket.