Downstream 2/1 Oxygen Sensor Replacement

REMOVAL
1. Disconnect the negative battery cable.
2. Raise and support the vehicle.

Fig. 21 Downstream Oxygen Sensor (1/2):

Fig. 22 Downstream 2/1 O2 Sensor:

3. Disconnect the electrical connector.

Fig. 19 O2 Sensor Downstream 1/2:

4. Use a socket such as the Snap-On(R) YA8875 or equivalent to remove the sensor.
5. When the sensor is removed, the threads must be cleaned with an 18 mm X 1.5 + 6E tap. If using the original sensor, coat the threads with Loctite 771-64 anti-seize compound or equivalent.

INSTALLATION
The O2S are located on the side of the catalytic converter.

Threads of new oxygen sensors are factory coated with anti-seize compound to aid in removal. DO NOT add any additional anti-seize compound to the threads of a new oxygen sensor.
1. Install sensor and tighten to 27 Nm (20 ft. lbs.).
2. Connect the electrical connector.
3. Lower vehicle.
4. Install the negative battery cable.