Through the years, improvements in automotive technologies have brought about numerous parts, such as the Chevrolet Lumina oxygen sensor, that are quite remarkable in their ability to monitor and regulate various mechanical systems. An oxygen sensor, located after the combustion system, most often close to the very beginning of the exhaust system, where the exhaust fumes are the hottest, serves to measure the amount of oxygen left after the fuel burn. If the amount of oxygen detected is outside of the acceptable range, the oxygen sensor signals the main computer of the vehicle that there is a problem.

The main computer then tries to resolve the problem by making adjustments to the air-to-fuel ratio, in an effort to improve the quality of the burn, making sure that the burn is complete, rather than wastefully allowing unburned fuel to pass into the exhaust system. If your oxygen sensor is not functioning as well as it should or has failed completely, then your combustion system does not have the advantage of the computer being able to precisely set the air-to-fuel ratio, as the main computer will not have the information necessary to do so.

What usually happens in that case is that the air-to-fuel ratio will, in the absence of the data provided by the Chevrolet Lumina oxygen sensor, revert to default settings, which tend to be a bit rich, or heavy on the fuel. It should come as no surprise, then, that a noticeable reduction in fuel mileage is one of the symptoms you can expect to experience if your oxygen sensor is failing, as well as other symptoms associated with an out of balance combustion system, including rough running and a sort of generalized poor performance.You’ll find a quality Chevrolet Lumina oxygen sensor selection in our online catalog, readily available and easy to order, using either our secure site or our toll-free telephone number.