Sensor, Oxygen: Removal: 3.2L: Rear
The engine is equipped with four heated oxygen sensors:
- The rear upstream oxygen sensor is referred to as the 1/1 sensor.
- The rear downstream oxygen sensor is referred to as the 1/2 sensor.
WARNING:
The exhaust pipes and catalytic converter become very hot during engine operation. Allow the engine to cool before removing the oxygen sensor.
- Disconnect and isolate the negative battery cable. If equipped with an Intelligent Battery Sensor (IBS), disconnect the IBS connector first before disconnecting the negative battery cable.
- Remove the resonator Refer to RESONATOR, AIR CLEANER, REMOVAL
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CAUTION:When disconnecting the oxygen sensor electrical connector, do not pull directly on the wire going into the sensor. The sensor wiring can be damaged resulting in sensor failure.
- Disconnect the heated Oxygen (O2) sensor electrical connectors (1, 2).
- Remove the O2 sensors (3, 5).
- Clean the exhaust pipe threads using an appropriate tap.