An oxygen sensor, also known as an O2 sensor, is a critical component in a vehicle's exhaust system that monitors the level of oxygen in the exhaust gases. This information is relayed to the engine control unit (ECU), which adjusts the air-fuel mixture to ensure optimal combustion. By maintaining the correct air-fuel ratio, the oxygen sensor helps enhance engine performance, improve fuel efficiency, and reduce harmful emissions. Proper functioning of the oxygen sensor is essential for the vehicle to meet emission standards and avoid issues such as poor fuel economy and increased exhaust pollutants.
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