Monday, October 28, 2013
How to Replace an Oxygen Sensor on a 98 Honda Civic
A 1998 Honda Civic has two oxygen sensors: one between the catalytic converter and the exhaust pipe, and a second located behind the catalytic converter in the exhaust manifold. The purpose of an oxygen sensor is to monitor the oxygen levels in the exhaust. A bad oxygen sensor can cause the "check engine" light to come on. The engine may also run poorly and blow smoke out the tail pipe. Replacing an oxygen sensor is not difficult if you have right tools and time.
Instructions
- 1
Spray penetrating oil around the base of the primary oxygen sensor where it threads into the exhaust pipe. The oxygen sensor is located in exhaust components that heat up and cool down and may be difficult to remove. You will need to be under the Civic to access the sensor .
2Disconnect the oxygen sensor from the wiring harness.
3Place the ratchet and oxygen sensor socket over the top of the oxygen sensor. The socket has a slot for the sensor wires to pass through which allows you to loosen the oxygen sensor from its mounting collar. Turn the socket counterclockwise to loosen the oxygen sensor.
4Remove the socket from the oxygen sensor when it has become loose enough to turn by hand. Remove the oxygen sensor and discard. Oxygen sensors contain precious metals and should be recycled properly or returned to an automotive store.
5Install a new oxygen sensor into the threaded collar by hand and turn it clockwise until it is tight. Place the oxygen sensor socket over the top of the new oxygen sensor to fully tighten it. Connect the new oxygen sensor to the old wiring harness.
6Spray penetrating oil around the base of the secondary oxygen sensor where it threads into the exhaust manifold. Remove the secondary oxygen sensor from the engine compartment.
7Repeat Steps 2 through 5 to remove and install the secondary oxygen sensor.
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