ROANOKE, Va.--Most people learn when they are very young that everyone has five senses: hearing, smelling, tasting, touching, and seeing. Similarly, todays vehicles have sensors in the engine that must be maintained and checked regularly so that the vehicle can get maximum fuel economy, and that everything stays running smoothly.

Pay attention to your check engine light and your vehicles sensors or you could pay the price, says Bryan Gregory Advance Auto Parts director of consumer education.

Sensors monitor air-fuel mixture, engine temperature, air-flow, wheel speed and more, so essentially they are telling your vehicles computer what to do, Gregory states. If your sensors fail, your engine may experience poor mileage and performance, and in severe cases your engine may fail altogether.

In most cases, a check engine light will illuminate to let you know that there is a problem. Any Advance Auto Parts store will scan your OBD (On-Board Diagnostic) port at no charge and print out the fault code to help you determine your next steps.

Access to these sensors is usually the most difficult part of the replacement process. In the case of oxygen sensors, the project can be simplified by using a specially designed O2 sensor socket that accommodates the sensor wiring. A Haynes Repair Manual specific to your vehicle can be very helpful when replacing sensors.

If you would like more tips or hints on how to check/replace these sensors, or perform other do-it-yourself projects on your vehicle, be sure to stop by your local Advance Auto Parts store where our knowledgeable and friendly Team Members will be glad to assist you. Or visit AdvanceAutoParts.com and click on Know-How, and learn how to do the job right, the first time watching our Sensors 101 video clinic.