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The oxygen sensor monitors the level of oxygen in your vehicle’s exhaust gases, providing essential data to the engine control unit (ECU) for optimizing the air-fuel mixture and ensuring efficient combustion. A malfunctioning oxygen sensor can lead to poor fuel economy, increased emissions, and potential engine performance issues such as rough idling or hesitation during acceleration. Regularly inspect the oxygen sensor for signs of wear, contamination, or malfunction, and replace it as needed according to your vehicle’s maintenance schedule, typically every 60,000 to 100,000 miles. Maintaining a healthy oxygen sensor ensures accurate air-fuel ratios, enhances engine efficiency, and reduces harmful emissions, contributing to a cleaner and more efficient vehicle.