Downstream 1/2 Replacement
REMOVALFig. 28 Downstream Heated Oxygen Sensor:
The downstream heated oxygen sensor threads into the exhaust outlet pipe behind the catalytic convertor.
1. Raise vehicle.
2. Disconnect electrical connector from harness.
3. Disconnect sensor electrical harness from clips along body.
Fig. 29 Downstream Heated Oxygen Sensor Removal/Installation:
4. Remove sensor using an oxygen sensor crow foot wrench such as Snap-On tool YA8875 or equivalent.
5. 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 771-64 or equivalent.
INSTALLATION
The downstream heated oxygen sensor threads into the exhaust outlet pipe behind the catalytic convertor.
New sensors have compound on the threads and do not require an additional coating.
1. Install sensor using an oxygen sensor crow foot wrench such as Snap-On tool YA8875 or equivalent. Tighten the sensor to 28 Nm (20 ft. lbs.) torque.
2. Connect sensor electrical harness from clips along body.
3. Connect electrical connector to harness.
4. Lower vehicle.