Commander 4WD V8-4.7L Flex Fuel (2009)
Oxygen Sensor: Service and Repair
Removal
REMOVAL
Refer to graphic for typical O2S (oxygen sensor) locations if equipped with four oxygen sensors.
Refer to graphic for typical O2S (oxygen sensor) locations if equipped with two oxygen sensors.
CAUTION: Never apply any type of grease to the oxygen sensor electrical connector, or attempt any soldering of the sensor wiring harness.
WARNING: The exhaust manifold, exhaust pipes and catalytic converter become very hot during engine operation. Allow the engine to cool
before removing the oxygen sensor.
1. Raise and support the vehicle.
2. Disconnect the electrical connector from O2S sensor.
3. If equipped with four oxygen sensors and removing the right-upstream O2S (2/1) sensor, support the transmission with a safety stand or jack and
remove the bolts attaching the crossmember to frame and slightly lower the transmission to gain access to the O2S sensor electrical connector,
disconnect the connector.
CAUTION: When disconnecting the sensor electrical connector, do not pull directly on the wire going into sensor.
4. Remove O2S sensor with an oxygen sensor removal and installation tool.
5. Clean threads in exhaust pipe using appropriate tap.
