Oxygen Sensor: Service and Repair

REMOVAL

REMOVAL - 1/1

Fig. 14 Heated Oxygen Sensor-1/1 Location:

The engine uses two upstream heated oxygen sensors, one in each exhaust manifold.

WARNING: THE EXHAUST MANIFOLD, EXHAUST PIPES AND CATALYTIC CONVERTER BECOME VERY HOT DURING ENGINE OPERATION. ALLOW ENGINE TO COOL BEFORE REMOVING OXYGEN SENSOR.

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

1. Disconnect the heated oxygen sensor electrical connector.

Fig. 15 Heated Oxygen Sensor-1/1:

2. Use a socket such as Snap-On YA8875 or Special tool C4907A to remove oxygen sensor.

REMOVAL - 2/1

Fig. 16 Heated Oxygen Sensor-2/1:

The engine uses two upstream heated oxygen sensors, one in each exhaust manifold.

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

1. Disconnect the heated oxygen sensor electrical connector.
2. Use a socket such as Snap-On YA8875 or Special tool C4907A to remove oxygen sensor.

REMOVAL

Fig. 17 Downstream Heated Oxygen Sensor-1/2, 2/2:

The O2S are located at the outlet ends of the catalytic converter.

WARNING: THE EXHAUST MANIFOLD, EXHAUST PIPES AND CATALYTIC CONVERTER BECOME VERY HOT DURING ENGINE OPERATION. ALLOW ENGINE TO COOL BEFORE REMOVING OXYGEN SENSOR.

1. Raise and support the vehicle.
2. Disconnect the wire connector from the O2S.

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

3. Remove the O2S. Snap-On oxygen sensor wrench (number YA 8875) may be used for removal and installation.

INSTALLATION

INSTALLATION - 1/1
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 the heated oxygen sensor electrical connector.

INSTALLATION - 2/1
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 the heated oxygen sensor electrical connector.

INSTALLATION
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 the O2S. Tighten to 28 Nm (20 ft. lbs.) torque.
2. Connect the O2S wire connector.
3. Lower the vehicle.