What is one of the purposes of an oxygen sensor in a vehicle?

The purpose of an oxygen sensor in a vehicle is to monitor the air-fuel mixture for optimal combustion. This sensor plays a crucial role in the engine management system by providing feedback on the amount of oxygen in the exhaust gases. By measuring the oxygen levels, the engine control unit (ECU) can adjust the fuel injection system to ensure that the air-fuel ratio remains within an ideal range. This optimization is essential for efficient combustion, improved fuel economy, reduced emissions, and overall engine performance. Precise monitoring of the air-fuel mixture allows for adjustments that help maintain the engine running smoothly while minimizing the environmental impact.