Tools Required

J 39194-B Heated Oxygen Sensor Wrench

Notice: Remove oxygen sensors with the engine temperature above 48°C (120°F). Otherwise the oxygen sensors may be difficult to remove.

Notice: 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.

Caution: To avoid any vehicle damage, serious personal injury or death when major components are removed from the vehicle and the vehicle is supported by a hoist, support the vehicle with jack stands at the opposite end from which the components are being removed and strap the vehicle to the hoist.

1. Raise the vehicle.
2. Remove the oxygen sensor wiring harness heat shield.
3. Disconnect the heated oxygen sensor (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).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

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.