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How to Replace the O2 Sensor in a Cadillac

by Johnathan Cronk

Cadillac is a luxury line of vehicles designed and manufactured by General Motors. They are equipped with an oxygen sensor, which controls the amount of oxygen within the exhaust. This allows the engine to run at full efficiency without becoming clogged with exhaust. It's important to replace a bad sensor immediately to ensure the vehicle continues to run smoothly.

Place the Cadillac in "Park" and turn off the engine. Leave the vehicle to cool for about 15 minutes. This will ensure the sensor is still warm without being too hot to touch, which is ideal for removal and replacement.

Open the hood and locate the oxygen sensor, which is on the exhaust manifold. Follow the exhaust pipe until you reach a small cylinder plug component with a wire coming out of the very top of it. This is the oxygen sensor.

Remove the wire by pulling it out of the current sensor and place it safely to the side.

Remove the oxygen sensor from the exhaust manifold, using an oxygen sensor socket with a socket wrench. The oxygen sensor socket fits snugly and is easiest to use when removing the sensor. Turn the wrench counterclockwise until the sensor is loose enough to remove easily. Remove the sensor by pulling it straight off the manifold.

Align the replacement oxygen sensor on the manifold. Secure the new sensor, using the socket wrench and oxygen sensor socket. Insert the wire into the new sensor; it will click once it's secured into the sensor. The sensor has now been replaced and is ready for use. Close the hood of the Cadillac.

Items you will need

About the Author

Johnathan Cronk is a freelance writer and began writing at the age of 18. Throughout his career he has specialized in sports, how-to and advice articles. He has also written sales pitches in the corporate setting since 2001. He studied business at Hudson Valley Community College before transferring to the State University of New York, Albany.

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