In this guide, friend will discover instructions on exactly how to change the upstream oxygen sensor ~ above a Chevrolet vehicle.

You are watching: 2003 chevy impala o2 sensor location


Check Engine light is ONA decrease in fuel economyEngine uncertainty or misfireRough Idling

What you will certainly need


Park her Chevrolet on level floor and set the parking brakes. 

Pull the hood relax under the dashboard top top the driver"s side. Your browser does not support video clip tag.

Disconnect the an adverse battery terminal. Eliminate the plastic cover. Loosen the 10mm nut. Eliminate the negative clamp native the battery.

Locate the oxygen sensor top top the exhaust manifold.

Downstream sensors financial institution 1 Sensor 2 and Bank 2 Sensor 2 deserve to be accessed native under the vehicle. Do not touch the sensor or the warmth shield until the engine cools down.

Disconnect the O2 sensor. Press the connector and also pull it away to unplug the oxygen sensor. Usage a level head screwdriver to push the locking tab on the connector prior to you pull it.


Place the oxygen sensor socket on the sensor and break that loose. If the sensor cannot be loosened spray penetrating oil and also let it sit because that at the very least 10 minutes. This will certainly make it easier to remove the old Chevrolet oxygen sensor.


Install the brand-new oxygen sensor. Tighten the brand-new Chevrolet oxygen sensor to the encourage torque. If you space unsure of the correct torque specs, speak to your regional Chevy dealer.

Connect the oxygen sensor cable harness by plugging the in. If you room using a global oxygen sensor, you will must use the diagram the came with the sensor to uncover out i beg your pardon wires come 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.

See more: What Is Playready Pc Runtime X86, What Is Playready Pc Runtime Amd64

All Chevrolet cars have at least two sensors through 6 and also 8 cylinder engines having up come four. ~ you check out the fault codes, you will acquire a code that points to a negative oxygen sensor such as bank 1 Sensor 1. This will permit you to identify which one of the oxygen sensors need to be replaced.