How to Replace an Oxygen Sensor in an Oldsmobile Silhouette

by Dan Ferrell
Photo courtesy of mnemo at Wikipedia.org.

Your Oldsmobile Silhouette comes equipped with two Heated Oxygen Sensors (HO2S) to keep vehicle emissions under control. Once the sensors have passed their service life, emissions begin to increase, which may affect fuel consumption and engine performance as well.

Removing the Oxygen Sensor

Step 1

Start the engine and let it reach operating temperature to facilitate oxygen sensor removal (see Warnings).

Step 2

Turn off the engine.

Step 3

Open the hood and locate the oxygen sensors you want to replace on your Oldsmobile Silhouette. Follow the exhaust pipe connected to the exhaust manifold. The upper stream sensor is threaded onto the exhaust pipe, right before the catalytic converter. The downstream sensor is threaded to the exhaust pipe right after the catalytic converter.

Step 4

Raise the vehicle using a floor jack.

Step 5

Support the vehicle on 2 jack stands.

Step 6

Unplug the oxygen sensor electrical connector.

Step 7

Unscrew the oxygen sensor using a box-end wrench or a ratchet and oxygen sensor socket.

Remove the sensor from the vehicle.

Installing the Oxygen Sensor

Step 1

Apply a light coat of anti-seize compound to the threads of the new oxygen sensor. Make sure to keep the sensor's tip free of compound, dirt and grease.

Step 2

Start the new sensor on the exhaust pipe by hand to avoid damage to the threads.

Step 3

Tighten the sensor.

Step 4

Connect the oxygen sensor electrical connector.

Step 5

Replace the other sensor, if necessary, following steps 6, from the previous section, through step 4 of this section.

Lower the vehicle.

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