These include the Oxygen Sensor, the Distributor Cap and Distributor Rotor, as well as the PCV valve. The Oxygen Sensor An Oxygen Sensor is a crucial component on today's vehicles. Oxygen sensors are roughly the size of a spark plug and live in your car's exhaust system. They measure the oxygen content of the exhaust. This vital information is sent to your vehicle's onboard computer, where it is evaluated.
Complete combustion provides lower emissions, better fuel economy and better performance.
Oxygen sensors play a key role in assuring that your vehicle passes stringent emission testing. Studies show that two-thirds of all vehicles, which fail state emission testing, fail because of faulty Oxygen sensors. Your local dealer can test the operation of your Oxygen sensor to insure that it is working correctly. If faulty sensors go unnoticed, tail pipe emissions will climb and fuel mileage will drop off. Typically, sensor replacements are done between 30,000 and 100,000 miles, depending on your vehicle's manufacturer recommendation.