O2S Sensor: Removal

Never apply any type of grease to the oxygen sensor electrical connector, or attempt any soldering of the sensor wiring harness.

Oxygen sensor (O2S) locations are shown in (Fig 1 ) and (Fig 2 ).

WARNING: THE EXHAUST MANIFOLD, EXHAUST PIPES AND CATALYTIC CONVERTER(S) BECOME VERY HOT DURING ENGINE OPERATION. ALLOW ENGINE TO COOL BEFORE REMOVING OXYGEN SENSOR.

Raise and support vehicle.
Disconnect O2S pigtail harness from main wiring harness.
If equipped, disconnect sensor wire harness mounting clips from engine or body.
CAUTION: When disconnecting sensor electrical connector, do not pull directly on wire going into sensor.
Remove O2S sensor with an oxygen sensor removal and installation tool.

Fig 1: Oxygen Sensor Locations - 4.0L Engine
Courtesy of DAIMLERCHRYSLER CORP.

Fig 2: Oxygen Sensor Locations - 4.7L V-8 Engine
Courtesy of DAIMLERCHRYSLER CORP.