What does a bad O2 sensor do to a Cadillac?
On One Hand: A bad oxygen sensor will increase fuel use.In a Cadillac, as well as any other vehicle with an internal combustion engine, the oxygen sensor plays a critical role in adjusting the air/fuel ratio that is sent into the cylinders. When the oxygen sensor begins to fail, you will likely see an increase in fuel consumption. According to Popular Mechanics, an old oxygen sensor will lead to a drop in fuel economy, cause driving issues and, eventually, an illuminated “Check Engine” light.On the Other: You may not feel the drop in fuel economy.The drop in fuel economy may or may not be substantial and you may not sense an increase in fuel use, especially if you use your car in a variety of road conditions. Therefore, you should always keep an eye on the “Check Engine” light to see if your vehicle’s onboard diagnostic computer has identified a problem with the oxygen sensor or any other engine component. In addition, you should also check the onboard diagnostic computer periodically
