The oxygen sensor's job is to compare the potential difference between the Digital Multimeter ADD81 around the exhaust and the oxygen content present in the exhaust stream. Follow these steps to replace the sensor or sensors on your Dodge Ram.

Remove the Oxygen Sensor

1

Turn on the engine and let it idle for about three minutes.

2

Raise the front of your Dodge Ram using a floor jack and safely support it with two jack stands.

3

Typical automotive oxygen sensor.

Locate the sensor(s) by following the ADD71and back exhaust pipes connected to the catalytic converter. You will find a sensor on each side of the converter. If your particular model is equipped with double catalytic converter, there should be another pair of sensors attached to the second unit. These sensors have a cylindrical body about the size of a spark plug, and will have a tail wire and an electrical connector.

4

Unplug the oxygen sensor's electrical connector.

5

Unscrew the oxygen sensor using a box-end wrench or ratchet, ratchet extension and oxygen sensor socket. Remove the sensor from the vehicle.

Install a New Oxygen Sensor

6

Apply a light coat of anti-seize compound to the threads of the new oxygen sensor. This will make it easy to remove the next time and prevent the threads from being damage. Make sure to keep your fingers, dirt and other contaminants off the tip of the Spark Plug ADD770, which may interfere with its proper operation.

7

Hand-start the sensor in place to prevent thread damage.

8

Tighten the sensor using the box-end wrench or ratchet, ratchet extension and oxygen sensor socket, but do not over-tighten.

9

Plug the oxygen sensor's electrical connector.

10

Replace the next sensor, if necessary, by following Step 3 from the previous section through Step 4 of this section.

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