Upstream Heated Oxygen Sensor

Fig. 41 Heated Oxygen Sensor-Typical:

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

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

REMOVAL
1. Raise and support vehicle.
2. Disconnect heated oxygen sensor electrical connector (Fig. 41).
3. Remove sensor using an oxygen sensor crow foot wrench such as Snap-On tool YA8875 or equivalent

INSTALLATION
1. After removing the sensor, the exhaust manifold threads must be cleaned with an 18 mm X 1.5 + 6E tap. If reusing the original sensor, coat the sensor threads with an anti-seize compound such as Loctite(r) 771-64 or equivalent. New sensors have compound on the threads and do not require an additional coating.
2. Install sensor using an oxygen sensor crow foot wrench such as Snap-On tool YA8875 or equivalent
3. Tighten the sensor to 27 Nm (20 ft. lbs.) torque.
4. Plug sensor connector.
5. Lower vehicle.