How to Change an Oxygen Sensor

# Locate the oxygen sensor on your vehicle by looking for a part that looks like a spark plug that sticks out from the exhaust pipe. It will have an electrical connection attached to it.[[Image:Change an Oxygen Sensor Step 1.jpg|center]]
# Disconnect the electrical connection on the oxygen sensor. Use a flat tip screwdriver to push in the tabs and pull the connection apart.[[Image:Change an Oxygen Sensor Step 2.jpg|center]]
# Unscrew the oxygen sensor off the exhaust pipe using either an open-end wrench or a special socket made to remove it. The majority of oxygen sensors will take an SAE {{convert|7/8|in|cm|adj=on|1|1}} wrench.[[Image:Change an Oxygen Sensor Step 3.jpg|center]]
# Compare your new oxygen sensor to the old one. If the new one did not come with an electrical connection, but just with the wires stubbed out, you need to do a little work.[[Image:Change an Oxygen Sensor Step 4.jpg|center]]
#* Cut off the old connector from the bad oxygen sensor, strip the wires and solder the wires to the new oxygen sensor. You can also use butt connectors.
#* Use heat sensitive shrink tape to seal the connections.
#* Follow manufacturer's instructions to know which wires to tie together.
# Reverse the steps used in removing the oxygen sensor and install the new part. Add a small amount of anti-seize to the threads of the new sensor. Screw it in place clockwise and snug it down with the socket or open-end wrench. Do not over tighten the sensor as you might strip the threads.[[Image:Change an Oxygen Sensor Step 5.jpg|center]]
# Plug the electrical connections back in.[[Image:Change an Oxygen Sensor Step 6.jpg|center]]
# Turn on the ignition key, but do not start your vehicle. Use the diagnostic scanner/reader to clear the code from the vehicle's computer.[[Image:Change an Oxygen Sensor Step 7.jpg|center]]
# Start the car. You should notice an immediate improvement.[[Image:Change an Oxygen Sensor Step 8.jpg|center]]

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