2005 Chevy Impala Upstream Oxygen Sensor
The primary or upstream oxygen sensor in your Chevy Impala is a four wire unit. It's mounted into your exhaust manifolds, and reads the exhaust gases from your 3.4 or 3.8 liter engine. This upstream oxygen sensor reads your exhaust gases to see just how much fuel is present. This helps your engine computer make adjustments to ensure that your Impala engine stays efficient as possible.
When your Impala Upstream Oxygen Sensor starts to go bad on you, you'll see a variety of issues with your Chevy Impala. Your Chevy will also run poorly and your engine will run inefficiently. It can also prevent your Impala from starting all together, and can make your Impala waste fuel and get poor gas mileage. If you are interested in testing your Impala Upstream Oxygen Sensor, check our guide here where we show you how to troubleshoot a 2001 Chevy Impala O2 sensor.
You can use this guide to troubleshoot your Impala primary O2 sensor with a OBDII scan tool. Conversely if the sensor goes bad, you'll need a digital multimeter to test the function of your primary oxygen sensor and make sure it's in good condition.
This replacement Chevy Impala Oxygen Sensor is engineered and manufactured to meet or exceed all manufacturer specifications. Designed for a durable long life of service, it's also an excellent choice to fix your upstream oxygen sensor related check engine code.
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