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How to Install an Oxygen Sensor on a 2001 Galant

If the Check Engine light has come on in your 2001 Mitsubishi Galant, the oxygen sensor may be to blame. An oxygen sensor regulates the air-to-fuel mixture based on how much oxygen the sensor detects in the exhaust. If a sensor fails, your fuel consumption may increase noticeably, and youll want to replace it immediately. You can replace it yourself. The oxygen sensor is located on the exhaust manifold, accessed from beneath the truck. Buy a new sensor from an auto parts store.

Instructions

1

Raise the front of your 2001 Galant with a jack and support it on a set of jack stands. Remove the jack once the car is secure on the jack stands.

2

Be sure the engine is cool. Slide under the Galant. Disconnect the electrical connection from the oxygen sensor. The sensor protrudes from the exhaust manifold with the wiring harness connected to the top of the sensor. Press the retaining clip in while pulling the connector free.

3

Remove the oxygen sensor from the manifold using an oxygen sensor socket and a ratchet. Discard the old sensor.

4

Insert the new oxygen sensor and thread it by hand until tight. Torque the sensor to 30 pound-feet with your torque wrench. Press the electrical connection into place until it clicks.

5

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