Upstream 1/1 Replacement

REMOVAL - 1/1 UPSTREAM
1. Remove the air cleaner lid and makeup air hose.
2. Remove the negative battery cable.
3. Disconnect electrical connector from sensor.

Fig. 42 Oxygen Sensor 1/1 Upstream:

4. Remove sensor using an oxygen sensor special tool C-4907.

INSTALLATION - 1/1 UPSTREAM
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 771-64 or equivalent. New sensors have compound on the threads and do not require an additional coating. Tighten the sensor to 28 Nm (20 ft. lbs.) torque.
2. Connect electrical connector to sensor.
3. Install the negative battery cable.
4. Install the air cleaner lid and makeup air hose.