Downstream Heated Oxygen Sensor

Fig. 91 Downstream Heated Oxygen Sensor:

NOTE: The O2S sensors are located at the outlet ends of the catalytic converter (Fig. 91).

WARNING: The exhaust manifold, exhaust pipes and catalytic converter become very hot during engine operation. Allow engine to cool before removing oxygen sensor.

REMOVAL
1. Raise and support the vehicle.
2. Disconnect the wire connector from the O2 sensor.

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

3. Remove the O2 sensor. Snap-On oxygen sensor. wrench (number YA 8875) may be used for removal and installation.

NOTE: 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.

INSTALLATION
1. Install the O2S sensor.
- Tighten to 30 Nm (22 ft lb) torque.
2. Connect the O2S sensor wire connector.
3. Lower the vehicle.