O2 Sensor: Removal: 4.0L

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

Refer to Fig 1 and Fig 2, for O2S (oxygen sensor) location.

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

Raise and support vehicle.
Disconnect wire connector from O2S sensor.
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.
Clean threads in exhaust pipe using appropriate size tap.

Fig 1: OXYGEN SENSORS - 4.0L - FEDERAL EMISSIONS

Courtesy of DAIMLERCHRYSLER CORP.

1 - 1/2 O2S

2 - 1/1 02S

Fig 2: OXYGEN SENSORS - 4.0L - CALIFORNIA EMISSIONS

Courtesy of DAIMLERCHRYSLER CORP.

1 - 1/2 O2S

2 - 1/1 O2S

3 - 2/1 O2S

4 - 2/2 O2S