Fast Facts About O2 / Oxygen Sensors

The vast majority of vehicles on the road today contain 1 – 2 O2 / Oxygen Sensors inside of them:  One placed placed before and after a vehicle’s catalytic converter.  Their primary job function is to monitor the level of oxygen present in the fuel mixture going into and coming out from the catalytic converter.

Most people will experience rough idling when the vehicle is at or approaching a full stop, but there are a handful of other well-know problems associated with having a faulty O2 / Oxygen Sensor such as:

  • Vehicle running too lean
  • Vehicle running too rich
  • Reduced fuel economy (lower MPG)
  • Check engine service light illuminated
  • Failed mandatory emissions tests

If your vehicle is running too “lean”, it means there is too much oxygen and too little fuel in the O2 / Oxygen Sensor readings.  If your vehicle is running too “rich”, it means there is too little oxygen and too much fuel in the O2 / Oxygen Sensor readings.

What should I do if my O2 / Oxygen Sensor has failed?

If one or both of these sensors is out of order, it’s enough to trip the Check Engine light.  Fortunately, these sensors don’t take an exorbitant amount of time or money to replace!  If your check engine light is on, or you’ve noticed a difference in the fuel economy of your vehicle, it’s time to visit Street Automotive in Mesa, AZ!

If the problem is related to some other area in your vehicle, Street Automotive can help!

Family owned and operated.  Established in Mesa in 1989, our highly skilled Certified technicians offer comprehensive auto repair knowledge and experience.  You can be sure that your car will be inspected with the latest auto diagnostics equipment available and will be explained to you in layman’s terms.  We work on Most Makes and Models.  If you have any questions regarding our services feel free to call, or you can stop by our shop anytime to talk to one of our helpful mechanics!