Sensor, Oxygen: Removal: 5.7L: Downstream

Disconnect and Isolate the negative battery cable
Raise and support the vehicle. Refer to HOISTING, STANDARD PROCEDURE .
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.

Courtesy of CHRYSLER GROUP, LLC
Disconnect the oxygen sensor wire harness connector (2).
Disengage the wire harness from the retainer (3).
Remove the oxygen sensor (1).
Clean the threads in the catalytic converters using an appropriate tap.