Engine Coolant Temperature Sensor Replacement for Chevrolet Optra 2006

1. Relieve the coolant system pressure.

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

2. Disconnect the negative battery cable.
3. Disconnect the engine coolant temperature (ECT) sensor connector.

Notice: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.

4. Remove the ECT sensor.

Notice: Refer to Fastener Notice in the Preface section.




1. Install the ECT sensor.

Tighten
Tighten the ECT sensor to 17.5 N·m (13 lb ft).

2. Connect the ECT sensor connector.
3. Connect the negative battery cable.