Heated Oxygen Sensor (HO2S) 2 Replacement

TOOLS REQUIRED
J 39194-B Heated Oxygen Sensor Wrench

REMOVAL PROCEDURE

NOTE:
^ Remove oxygen sensors with the engine temperature above 48°C (120°F). Otherwise the oxygen sensors may be difficult to remove.
^ Take care when handling oxygen sensors. The electrical connector and louvered end must be kept free of contaminants. Do not use cleaning solvents on the sensor. Do not drop or mishandle the sensor.
^ Refer to Vehicle Lifting Caution in Service Precautions.




1. Raise the vehicle.
2. Remove the oxygen sensor wiring harness heat shield.
3. Disconnect the HO2S electrical connector.
4. Remove the electrical connector from the mounting hole.
5. Remove the HO2S from the exhaust pipe using the J 39194-B (1).

INSTALLATION PROCEDURE

NOTE: Refer to Fastener Notice in Service Precautions.

IMPORTANT: Ensure that the correct replacement HO2S is used. The engine HO2S 1 and the post-converter HO2S 2 are both 6.6-watt Denso sensors. Due to differences in pigtail length, the sensors use different connectors and are not interchangeable.




1. Install the HO2S in the rear exhaust pipe using the J 39194-B (1).

Tighten
Tighten the HO2S to 41 N.m (30 lb ft).

2. Install the electrical connector into the mounting hole.
3. Connect the HO2S electrical connector.
4. Reinstall the oxygen sensor wiring harness heat shield.
5. Lower the vehicle.