Sensor-Oxygen 4.0L

Fig 1: Oxygen Sensor 4.0L

Courtesy of CHRYSLER LLC

The engines uses two heated oxygen sensors.

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

Disconnect negative battery cable.
Disconnect the upper O2 sensor connector.
Use a socket such as Snap-On YA8875 or a crow foot wrench to remove oxygen sensor. See Figure.