Is your Chevrolet check engine light on, engine idles rough, or have you noticed poor fuel economy? These symptoms are often caused by a faulty oxygen sensor that needs to be replaced.

Before replacing the oxygen sensor on your Chevrolet, you should read the fault codes first to determine if you have a bad oxygen sensor.


  • Check Engine Light is ON
  • A decrease in fuel economy
  • Engine Hesitation or misfire
  • Rough Idling

What you will need

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  • Chevrolet Oxygen Sensor
  • Oxygen Sensor Socket
  • Ratchet Wrench
  • 10mm socket

A universal oxygen sensor can also be used, but you will need to do the wiring in many cases by following the provided diagram. Most universal oxygen sensors do not come prewired for your vehicle and are not plug-and-play.


  1. Park the Chevrolet on level ground and set the parking brakes.

  2. Pull the hood release under the dashboard on the driver’s side.
  3. Disconnect the negative battery terminal. Remove the plastic cover. Loosen the 10mm nut. Remove the negative clamp from the battery.negative battery terminal
  4. Oxygen sensor chevy

    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.

    oxygen sensor connector
  5. Disconnect the O2 sensor. Press the connector and pull it away to unplug the oxygen sensor. Use a flathead screwdriver to press the locking tab on the connector before pulling it.

    loosen oxygen sensor using o2 socket

    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 if it is rusted.

  6. Install the new oxygen sensor. Tighten the new Chevrolet oxygen sensor to the recommended torque. Call your local Chevy dealer if unsure of the correct torque specs.

  7. Connect the oxygen sensor wire harness by plugging it in. When using a universal oxygen sensor, you will need to use the diagram with the sensor to find which wires to connect.
  8. 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 needs to be replaced.

Check Engine Light Still On


If the check engine light is still on after you replace the Oxygen Sensor, you can use the YOUCANIC Full System Scanner to clear the stored codes. This scanner can also read and clear fault codes on every control module of your Chevrolet.

We hope you find this “Replace Chevrolet Oxygen Sensor” guide helpful. Check these troubleshooting and repair guides for more help on your Chevy.

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One Comment

  1. Anonymous says:

    thanks by the information, i’ve a question. When i lunch the scan , i’ve obtained: System too lean , bank 1. So, i need to change the sensor at front or rear ? i read that the Uplander 2006 have two sensors.