Oxygen Sensor - Removal

3.6L





The engine is equipped with four heated oxygen sensors:

- The right upstream oxygen sensor (1) is referred to as the 1/1 sensor.
- The right downstream oxygen sensor (4) is referred to as the 1/2 sensor.
- The left upstream oxygen sensor (3) is referred to as the 2/1 sensor.
- The left downstream oxygen sensor (2) is referred to as the 2/2 sensor.

WARNING: The exhaust pipes and catalytic converter become very hot during engine operation. Allow the engine to cool before removing the oxygen sensor.

1. Disconnect and isolate the negative battery cable.
2. Raise and support the vehicle Maintenance.

CAUTION: When disconnecting the oxygen sensor electrical connector, do not pull directly on the wire going into the sensor. The sensor wiring can be damaged resulting in sensor failure.

3. Disconnect the heated oxygen sensor electrical connector.
4. Remove the oxygen sensor.
5. Clean the exhaust pipe threads using an appropriate tap.