How To Change An Oxygen Sensor In A 2005 Jeep 3.7l

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Mute the speaker Listen to this using a male or female voice M/F 

By Christian Killian

The 2005 Jeep 3.7-liter engine is really a Chrysler 3.7-liter and can be found in the Jeep Liberty, Grand Cherokee and Jeep Commander vehicles. The upstream oxygen sensors on these engines are located in the exhaust manifold just above the flange where the exhaust downpipe bolts to the manifold. The downstream oxygen sensor is located in the exhaust pipe between the manifold and the catalytic converter. The location varies slightly from model to model, but the general location is the same.

Mute the speaker Listen to this using a male or female voice M/F Raise the front end of your Jeep with a jack and position a set of jack stands under the frame to support the Jeep. Remove the jack from under the Jeep so you are not trying to work around it.

Mute the speaker Listen to this using a male or female voice M/F Locate the oxygen sensor from under the Jeep. If you are working on the upstream sensor, you will find it in the exhaust manifold. If you are working on the downstream sensor, it is in the exhaust just in front of the catalytic converter.

Mute the speaker Listen to this using a male or female voice M/F Select the appropriate sensor and disconnect the electrical connector that joins the pigtail from the oxygen sensor to the wiring harness on the Jeep. Release the locking tab and pull the two connectors apart.

Mute the speaker Listen to this using a male or female voice M/F Remove the oxygen sensor using an oxygen sensor socket and ratchet, turning it counterclockwise until it is free of the manifold or exhaust pipe. Discard the old sensor and thread a new sensor into the manifold or exhaust pipe by hand. Tighten the sensor with an oxygen sensor socket and ratchet until it is secure.

Mute the speaker Listen to this using a male or female voice M/F Plug the connector from the oxygen sensor pigtail into the wiring harness connector, pushing the two halves together until the locking tab engages. Be careful to route the wiring pigtail away from the hot exhaust pipes when you install it.

Mute the speaker Listen to this using a male or female voice M/F Repeat the process to change any of the other three oxygen sensors on the Jeep. If you are not sure which ones are bad, have the computer scanned for trouble codes to narrow it down before you start the job.

Mute the speaker Listen to this using a male or female voice M/F Raise the front of the Jeep with a jack off the jack stands and remove them from under the frame. Lower the Jeep to the ground and remove the jack.

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