Posted on 7/25/2025
Your car’s oxygen sensor plays a big role in engine performance and fuel efficiency. It monitors the amount of oxygen in your vehicle’s exhaust gases and sends this information to the engine’s computer, which then adjusts the air-fuel mixture for optimal combustion. When the oxygen sensor begins to fail, it can cause a range of problems that affect how your car runs and how much fuel it uses. Understanding the warning signs can help you address issues early and avoid bigger repairs down the road. Check Engine Light Illuminates One of the first and most common signs of a bad oxygen sensor is the check engine light turning on. Because the oxygen sensor affects engine efficiency and emissions, your vehicle’s onboard diagnostics system will detect any irregularities and alert you. While the check engine light can come on for many reasons, a faulty oxygen sensor is a frequent culprit. A professional diagnostic scan is needed to confirm the exact c ... read more