Upstream Oxygen 1/1 Sensor Replacement

Fig. 42 Upstream Heated Oxygen Sensor:

The upstream heated oxygen sensor is installed in the exhaust manifold.

CAUTION: Do not pull on the oxygen sensor wire when unplugging the electrical connector.

WARNING: THE EXHAUST MANIFOLD AND CATALYTIC CONVERTER MAY BE EXTREMELY HOT. USE CARE WHEN SERVICING THE OXYGEN SENSOR.

REMOVAL
1. Raise and support vehicle.
2. Unplug oxygen sensor electrical connector.
3. Use a socket such as Snap-On YA8875 or equivalent to remove sensor.
4. When the sensor is removed, the exhaust manifold threads must be cleaned with an 18 mm X 1.5 + 6E tap. If using original sensor, coat the threads with Loctite 771-64 anti-seize compound or equivalent.

INSTALLATION
New sensors are packaged with compound on the threads and no additional compound is required.
1. Install sensor and tighten to 27 Nm (20 ft. lbs.) torque.
2. Connect the electrical connector.
3. Lower vehicle.