Oxygen Sensor: Service and Repair

Heated Oxygen Sensor (G39) with Oxygen Sensor Heater (Z19)

Special tools, testers and auxiliary items required

• Ring Spanner 7-Piece Set (3337)

Removing

- Remove engine cover. Refer to => [ Engine Cover ] Service and Repair.

- Disconnect the connector - 2 - for the Heated Oxygen Sensor (HO2S) (G39) from the bracket.






- Disconnect the connector and free up the wire to the oxygen sensor.

- Remove the oxygen sensor - 5 - using a tool from the (3337).






Installing

Note the following when installing:

• New oxygen sensors are coated with assembly paste; the paste must not get into slots of oxygen sensor body.

• For a used oxygen sensor, only coat threads with hot bolt paste. This paste must not come into contact with oxygen sensor slots. Hot bolt paste, refer to the Parts Catalog.

• Always install the oxygen sensor wire in the same location so it does not come into contact with the exhaust pipe.

• For the correct tightening specifications, refer to => [ Oxygen Sensors and Exhaust Temperature Control Overview ] Oxygen Sensors and Exhaust Temperature Control Overview.