In this guide, you will find instructions on how to replace the upstream oxygen sensor on a Chevrolet vehicle.
- Check Engine Light is ON
- A decrease in fuel economy
- Engine Hesitation or misfire
- Rough Idling
What you will need
Park your Chevrolet on level ground and set the parking brakes.
Pull the hood release under the dashboard on the driver's side.
- Disconnect the negative battery terminal. Remove the plastic cover. Loosen the 10mm nut. Remove the negative clamp from the battery.
Locate the oxygen sensor on the exhaust manifold. Downstream sensors Bank 1 Sensor 2 and Bank 2 Sensor 2 can be accessed from under the vehicle. Do not touch the sensor or the heat shield until the engine cools down.
Disconnect the O2 sensor. Press the connector and pull it away to unplug the oxygen sensor. Use a flat head screwdriver to press the locking tab on the connector before you pull it.
Place the oxygen sensor socket on the sensor and break it loose. If the sensor cannot be loosened spray penetrating oil and let it sit for at least 10 minutes. This will make it easier to remove the old Chevrolet oxygen sensor.
Install the new oxygen sensor. Tighten the new Chevrolet oxygen sensor to the recommended torque. If you are not sure what the correct torque call your Chevy dealer.
Connect the oxygen sensor wire harness by plugging it in. If you are using a universal oxygen sensor you will need to use the diagram that came with the sensor to find out which wires to connect.
Reconnect the battery negative cable.
This guide applies to vehicles such as Spark, Sonic, Bolt, Volt, Cruze, Malibu, Impala, Camaro, Corvette, City Express, Trax, Equinox, Traverse, Tahoe, Suburban, Colorado, Silverado, Sonic, Blazer, Astro, HHR, Uplander, Avalanche, etc.
All Chevrolet cars have at least two sensors with 6 and 8 cylinder engines having up to four. After you read the fault codes you will get a code that points to a bad oxygen sensor such as Bank 1 Sensor 1. This will allow you to identify which one of the oxygen sensors need to be replaced.