Heated Oxygen Sensor (Ho2S) Removal/Installation

WARNING:

• A hot engine and exhaust system can cause severe burns. Turn off the engine and wait until they are cool before removing the exhaust system.

CAUTION:

• Do not allow flammable objects such as the taping for bundling wiring harness to come into contact with the exhaust manifold and silencer.

NOTE:

• If penetrant lubricating spray penetrates the airflow hole of the HO2S, it could cause interference with the HO2S function.
• When removing the HO2S, wrap a rag around the lower position so that penetrant lubricating spray does not get sprayed into the airflow hole.

Fig 1: Identifying Heated Oxygen Sensor And Wrap Rag

1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0] ).
2. Lift up the vehicle.
3. Remove the floor under cover, (vehicles with floor under cover) (See FLOOR UNDER COVER REMOVAL/INSTALLATION ).
4. Remove the insulator and brace bar. (2WD) (See EXHAUST SYSTEM REMOVAL/INSTALLATION ).
5. Disconnect the HO2S connector.
   Fig 2: Removing Heated Oxygen Sensor Connector

   
6. Remove the clip A from the bracket.
7. Remove the clip B.
   Fig 3: Heated Oxygen Sensor Clip With Torque Specifications (2WD And 4WD)

   
8. Remove the HO2S using the SST  .
9. Install in the reverse order of removal.
   Fig 4: Removing Heated Oxygen Sensor Using SST With Torque Specifications