Dodge Durango

 Service Manual

Fuel System » Fuel injection system » Removal and installation
Oxygen sensor

REMOVAL

Never apply any type of grease to the oxygen sensor electrical connector, or attempt any soldering of the sensor wiring harness. For sensor operation, it must have a comparison source of oxygen from outside the exhaust system. This fresh air is supplied to the sensor through its pigtail wiring harness.

5.2L/5.9L Engines: The upstream O2S sensor is located on exhaust downpipe (Fig. 30). The downstream sensor is located near outlet end of catalytic converter (Fig. 31).

4.7L V-8 Engines: Refer to (Fig. 32) for locations.

Fig. 30 Upstream Oxygen Sensor Locations-5.2L/ 5.9L V-8 Engines

1 - EXHAUST PIPE

2 - UPSTREAM OXYGEN SENSOR

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

(1) Raise and support the vehicle.

(2) Disconnect the wire connector from the O2S sensor.

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

(3) Remove the O2S sensor with an oxygen sensor removal and installation tool.

Fig. 31 Downstream Oxygen Sensor Location-5.2L/ 5.9L V-8 Engines

1 - DOWNSTREAM OXYGEN SENSOR

2 - FRAME RAIL

3 - CATALYTIC CONVERTER

INSTALLATION

Threads of new oxygen sensors are factory coated with anti-seize compound to aid in removal. DO NOT add any additional anti-seize compound to the threads of a new oxygen sensor.

(1) Install the O2S sensor. Tighten to 30 N*m (22 ft. lbs.) torque.

(2) Connect the O2S sensor wire connector.

(3) Lower the vehicle.

Automatic shutdown (asd) relay

Fuel pump relay

Oxygen sensor heater relays

Throttle body-3.9/5.2/5.9L engines

Throttle body-4.7L v-8 engine

Throttle position sensor (tps)-3.9/ 5.2/5.9L engines

Throttle position sensor (tps)-4.7L v-8 engine

Idle air control (iac) motor-3.9/5.2/ 5.9L engines

Idle air control (iac) motor-4.7L v-8 engine

Manifold absolute pressure (map) sensor-3.9/5.2/5.9L engines

Manifold absolute pressure (map) sensor-4.7L v-8 engine

Powertrain control module (pcm)

Oxygen sensor

Air cleaner element (filter)

Engine coolant temperature sensor-3.9/5.2/5.9L engines

Engine coolant temperature sensor-4.7L v-8 engine

Intake manifold air temperature sensor-3.9/5.2/5.9L engines

Intake manifold air temperature sensor-4.7L v-8 engine

Power steering pressure switch