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How to Replace an O2 Sensor on an Aurora

The oxygen (O2) sensors on an Oldsmobile Aurora are a series of small sensors placed in the exhaust system that monitor the amount of unburned oxygen in the exhaust. The O2 sensors relay this information to the engines computer so it can make adjustments to help the engine to run more efficiently and lower vehicle emissions. The Aurora is equipped with four O2 sensors, one in each exhaust manifold, one between the exhaust manifold and catalytic converter, and one after the catalytic converter. You can use a diagnostic code scanner to determine which sensor is malfunctioning. If you do not own a code scanner, take your Aurora to an auto parts store; many have code scanners and will check your car for free.

Instructions

1

Disconnect the ground cable from the negative battery terminal by loosening the retaining bolt and pulling the clamp off the negative terminal. Secure the ground cable so that it cannot accidentally contact the negative battery terminal.

2

Raise the vehicle and support it with jack stands underneath the frame.

3

Disconnect the wiring harness from the sensor. Follow the wires connected to the sensor until you find a plastic wiring connector. Separate the wiring harness by pulling the connector apart.

4

Use a wrench to remove the sensor from the exhaust pipe or manifold.

5

Thread the new O2 sensor into the exhaust pipe or manifold, and tighten it.

6

Connect the wiring harness on the new O2 sensor to the plastic wiring connector that you removed from the old O2 sensor.

7

Lower the vehicle.

8

Reconnect the ground cable to the negative battery terminal. Tighten the retaining bolt that secures the ground cable to the negative battery terminal.

Posted by Unknown at 9:45 PM

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