Lower O2 Sensor

REMOVAL
The engines uses two heated oxygen sensors.

CAUTION: When disconnecting the sensor electrical connector, do not pull directly on wire going into sensor.

1. Disconnect negative battery cable.
2. Raise and support vehicle.
3. Disconnect the electrical connector.

Lower O2 Location:

4. Use a socket such as Snap-On YA8875 or a crow foot wrench to remove oxygen sensor.

INSTALLATION

NOTE: When replacing an O2 Sensor, the PCM RAM memory must be cleared, either by disconnecting the PCM C-1 connector or momentarily disconnecting the Battery negative terminal. The NGC learns the characteristics of each O2 heater element and these old values should be cleared when installing a new O2 sensor. The customer may experience driveability issues if this is not performed.

1. After removing the sensor, the 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 771- 64 or equivalent. New sensors have compound on the threads and do not require an additional coating. Tighten the sensor to 28 N.m (20 ft. lbs.) torque.

Lower O2 Location:

2. Connect the heated oxygen sensor electrical connector.
3. Lower vehicle.
4. Connect the negative battery cable.