Downstream Oxygen Sensor Replacement

Fig 122 Oxygen Sensor Grommet Cover:

WARNING: The exhaust manifold may be extremely hot -- use care when servicing the oxygen sensor.

REMOVAL
1. Raise and support vehicle.
2. Remove grommet cover to expose connector (Fig. 122).

Fig 123 Oxygen Sensor Connector Locking Tab:

3. Push locking tab back and unplug oxygen sensor electrical connector (Fig. 123).

Fig 124 Oxygen Sensor Removal & Installation:

4. Use a socket such as Snap-On YA8875 or equivalent to remove sensor (Fig. 124).
5. 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
1. Reverse removal procedure to install a new sensor.
- New sensors are packaged with compound on the threads and no additional compound is required.
- The sensor must be tightened to 27 Nm (20 ft lb) torque.