How Long Does an Air Fuel Ratio Sensor Last?

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If you have a car that was made after 1980, then you have an air fuel ratio sensor. It is a component in your emissions control that sends information to your engine computer in order to help it run efficiently while producing as little as possible in the way of emissions. The gasoline engine in your car uses oxygen and fuel in a specific ratio. The perfect ratio depends on how much carbon and hydrogen are present in any given amount of fuel. If the ratio is not perfect, then fuel is left over – this is referred to as a “rich” mixture, and it causes pollution due to unburned fuel.

A “lean” mixture, on the other hand, doesn’t burn enough fuel, and emits too much oxygen, resulting in other types of pollutants called “nitrogen oxide” pollution. A lean mix can result in poor engine performance, and even damage. The oxygen sensor is located in the exhaust pipe, and it delivers information to the engine so that if the mixture is either too rich or too lean, it can be adjusted. Because the air fuel ratio sensor is used every time you drive, and because it is exposed to contaminants, it can fail. Usually, you will get anywhere from three to five years out of your air fuel ratio sensor.

Signs that your air fuel ratio sensor needs to be replaced include:

  • Poor fuel economy
  • Sluggish performance

If you think that your oxygen sensor needs to be replaced, or if you are experiencing other problems related to emissions control, you should have your vehicle checked out by a qualified mechanic. They can diagnose any problems that you may be having with your emissions control system, and if necessary, replace the air fuel ratio sensor.


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Bryant

11 years of experience
311 reviews
Bryant
11 years of experience
Infiniti FX35 - Brake Pads Replacement (Rear) - Indianapolis, Indiana
It was just an outstanding job with unexpected discounts. I can't just believe. For my very first experience you guys are awesome!
BMW 528i xDrive - Brake Pads Replacement (Front, Rear) - Carmel, Indiana
Bryant has done a great job changing my brakes, very knowledgeable and does his job excellently. Would definitely reccomend him!

Edgar

7 years of experience
33 reviews
Edgar
7 years of experience
Mazda 5 - Brake Pads Replacement (Rear) - Austin, Texas
Edgar was amazing. Showed up right away and found the leak to my car immediately. I also requested the back breaks be changed out. Both things were done in a reasonable time and I didn’t need to get an Uber or beg for a loaner car. Plan on using this service and Edgar’s help again in the near future.
Hyundai Elantra - Brake Pads Replacement (Front, Rear) - Austin, Texas
Edgar was punctual and professional. He did a great job on the service of my vehicle. I would totally recommend him to people I know and people I don’t know.

Brian

22 years of experience
264 reviews
Brian
22 years of experience
Mazda 3 - Brake Pads Replacement (Rear) - Jacksonville, Florida
Always gets the job done quickly and professionally while letting me know about upcoming maintenance

Daniel

10 years of experience
54 reviews
Daniel
10 years of experience
Toyota Corolla - Brake Pads Replacement (Front) - Richmond, California
Showed up on time. Daniel explained everything thoroughly and even finished the job ahead of schedule.

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