How to Fix an O2 Sensor on a 2004 Dodge Stratus

The 2004 Dodge Stratus base came equipped with a 2.4-liter four-cylinder engine and automatic transmission. The oxygen sensor on the Dodge Stratus relays to the computer the amount of oxygen in the exhaust. The computer uses this information to adjust fuel delivery for the best gas mileage, lowest emissions and best power. The Stratus has three different oxygen sensors, but the process for replacing them is the same.

Instructions

Removal

1

Park the vehicle on a level surface and set the parking brake. Allow the engine and exhaust to cool completely before continuing.

2

Lift the front of the vehicle into the air with the floor jack. Place the jack stands under the front frame rails of the vehicle. Lower the floor jack until the vehicle rests securely on the jack stands.

3

Locate the oxygen sensor to be replaced. The upstream oxygen sensor is on the exhaust manifold and the downstream oxygen sensor is on the catalytic converter.

4

Disconnect the oxygen sensor pigtail from the vehicle wiring harness. Slide the oxygen sensor socket over the oxygen sensor. Make sure the oxygen sensor pigtail is sticking through the slotted hole on the socket. Rotate the oxygen sensor socket counterclockwise with the ratchet. Remove the oxygen sensor.

Installation

5

Apply the included copper sealant to the threads of the new oxygen sensor. Install the oxygen sensor until hand tight. Install the oxygen sensor socket on the oxygen sensor. Tighten the oxygen sensor to 40 foot-pounds with the torque wrench.

6

Connect the oxygen sensor pigtail to the vehicle wiring harness.

7

Lift the vehicle off the jack stands with the floor jack. Remove the jack stands from under the vehicle. Lower the vehicle to the ground.

8

Clear the stored trouble codes if applicable.