Tools Required

J 39194 Oxygen Sensor Wrench

Notice: The Heated Oxygen Sensor (HO2S) and the Oxygen Sensor use a permanently attached pigtail and connector. Do not remove this pigtail from the Heated Oxygen Sensor. Damage or the removal of the pigtail or the connector could affect the proper operation of the sensor.

Notice: The oxygen sensor may be difficult to remove when the engine temperature is below 48°C (120°F). Excessive force may damage threads in the exhaust manifold or the exhaust pipe.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.



2. Remove the HO2S electrical connector retaining tab (1) from the HO2S electrical connector (2).
3. Disconnect the HO2S electrical connector from the HO2S electrical connector (2).
4. Use the J 39194 to remove the HO2S from the exhaust pipe.

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: A special anti-seize compound is used on the oxygen sensor threads. New service sensors should already have the compound applied to the threads. Coat the threads of a reused sensor with anti-seize compound P/N 12377953 or equivalent.

1. Install the oxygen sensor (4) to the exhaust pipe.

Tighten
Use the J 39194 to tighten the oxygen sensor to 41 N·m (30 lb ft).

2. Connect the HO2S connector (4) to the HO2S electrical connector (2).
3. Install the retaining tab (1) to the HO2S electrical connector.
4. Lower the vehicle.