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How to Change an Oxygen Sensor in a 2002 Hyundai Sonata

The 2002 Hyundai Sonata has two oxygen sensors along the exhaust. There is one sensor beside the manifold and one sensor near the catalytic converter. These sensors regulate the cars fuel consumption based on the amount of oxygen in the exhaust. If the car is inexplicably burning more fuel than usual or the "Check Engine" light is on, it may have a bad oxygen sensor. You can access and change the sensors easily at home. Buy replacement oxygen sensors from an auto parts store.

Instructions

1

Raise the car with a jack and rest it on a stable set of jack stands. Remove the jack once the jack stands are secure.

2

Locate the oxygen sensor protruding from the manifold or exhaust pipe. Pull the electrical connection free by pressing down on the retaining clip and pulling the connector straight out.

3

Remove the oxygen sensor with an oxygen sensor socket and ratchet. Discard the old sensor.

4

Apply a small amount of anti-seize compound to the threads of the new sensor. Do not get any anti-seize compound on the tip of the sensor. Thread the new sensor in carefully by hand. Tighten it with an oxygen sensor socket and ratchet. Torque the sensor to 40 pound-feet with a torque wrench.

5

Plug the electrical connection into the connector on the oxygen sensor. Repeat the process on the second sensor if necessary.

6

Raise the car slightly with the jack and remove the jack stands. Lower the car to the ground.