The air is one of the basic things that the living things need in order to continue their existence in this world. On the other hand, if it has been infested with pollution it can also be a great factor to endanger not only human beings but the animals and the plants. As the air is the element that we breathe to live, the pollution it contains should never get below or beyond the tolerable level. Therefore, we should always maintain clean air standards. And in order to achieve this, every contributors of air pollution should be regulated.
One of the major contributors is the automobile. If all the vehicles are potential sources of toxic gases, it would be shuddering to think of the volume of the gases that are merging with the air. But once the reality of it took hold on the automotive authorities, they countered this dilemma by integrating an oxygen sensor into the vehicles. In the early days this device was not standard on all automobiles. But apparently, the device was soon to become the most important technologies for minimizing exhaust emissions. In 1980's, oxygen sensors were made standard on all automobiles.
Your oxygen sensor, originally called lambda sensor, is the device that monitors the oxygen level in the exhaust. It has a component called, voltage signal which picks the data so that when delivered across the onboard engine management computer, the air/fuel mixture will be regulated properly. Accordingly, the computer should adjust the mixture in such a way that when the signal gets high voltage (rich mixture) it should command the fuel mixture to go lean. In the same manner, when it shows being lean, the computer should adjust it to become rich mixture. You would determine if the fuel mixture is perfectly balanced as well as the combustion is in its cleanest level when your oxygen sensor is signaling 0.45 voltages.
Your Buick oxygen sensor plays a key role in maintaining a clean emissions habit of your vehicle. And when it consistently performs at its best, meaning it is aiding the exhaust system of your Buick to release as few emissions as possible, it also helps in the engine performance. However, when it fails to carry out its proper task everything will be at stake. Most probably, the sensor oxygen is damaged. In order not to aggravate the matter, replace it as soon as possible.