Oxygen Sensor - Removal

5.7L/6.4L

UPSTREAM O2 SENSORS

NOTE: The upstream O2 sensors and connectors can be accessed from the top side of the engine.

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

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.

1. Disconnect the O2 sensor(s) electrical connectors located behind the cylinder head(s).
2. Using the appropriate oxygen sensor removal/installation tool, remove the O2 sensor(s).
3. Clean the threads in the exhaust pipe(s) using an appropriate tap.

DOWNSTREAM O2 SENSORS

1. Raise and support the vehicle.





NOTE: Removal of the left bank downstream O2 sensor may require the remove of the front prop shaft Drive Shaft - Removal .

2. Support the transmission with a safety stand or suitable jack, remove the crossmember retaining bolts and slightly lower the transmission to gain access to the O2S sensor electrical connector (2).

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.

3. Disconnect the O2 sensor(s) electrical connectors (2).
4. Using the appropriate oxygen sensor removal/installation tool, remove the O2 sensor (1).
5. Clean the threads in the catalytic converters using an appropriate tap.