The computer on your Chevy Venture uses data from the oxygen sensor and other components to determine the best air/fuel ratio during engine operation at any given moment. This helps lower harmful emissions and improves engine performance. However, exhaust by products cover and eventually interfere with proper operation of the oxygen sensor over time. Whether you need to change one or more sensors on your Chevy Venture model, use this guide to replace them.
Remove the Oxygen Sensor
Start the engine and let it idle for three minutes to bring it up to operating temperature. then turn off the engine. You can remove the oxygen sensor much easier with the exhaust system above 120 F (48 C).