Your Cadillac Deville oxygen sensor, also referred to as an O2 sensor, is located near your exhaust manifold in the direct path of your red-hot exhaust. However, your Deville oxygen sensor is not giving itself a steam bath; rather, this important component is responsible for determining the amount of oxygen contained in your exhaust, and delivering that information to your car's computer hundreds of times per minute. Your Cadillac Deville oxygen sensor is not indestructible, despite its ability to withstand heat.

If your Deville oxygen sensor becomes contaminated with oil, additives, antifreeze, or gasket sealant, it will either stop working or work intermittently. Of course, your Cadillac Deville oxygen sensor will eventually wear down over time as well.

No matter what the cause, if your Deville oxygen sensor is not working, you may notice a loss in fuel economy combined with sluggish engine performance and a hot running engine. This is due to the compensation of your computer for a faulty oxygen sensor. If your Deville oxygen sensor is not sending information, your car's computer has to guess, and it will guess high in order to avoid injecting too little fuel into your cylinders. Therefore, a bad Deville oxygen sensor wastes gas as well as diminishes performance. Other symptoms of a faulty oxygen sensor may include black exhaust smoke and a foul, rotten-egg odor coming from your exhaust. It is a good idea to replace your Deville oxygen sensor as a rule any time you have exhaust work done.If you need a replacement oxygen sensor, look no further than our vast online catalogue for an excellent selection of Deville oxygen sensors to choose from.