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Check Engine Light On? Could Be A Faulty O2 Sensor

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Check Engine Light On? Could Be A Faulty O2 Sensor

Car Care Check Engine Light Advice

According to the annual CarMD Vehicle Health Index one of the most common check engine light repairs is replacing the oxygen sensor. This relatively minor repair can be costly if neglected, leading to as much as 40 percent lower fuel efficiency, causing further damage to your vehicle's exhaust system and adversely impacting the environment.

Vehicles with faulty oxygen sensors typically seem to drive and handle well, but the malfunction can dramatically decrease fuel efficiency and lead to costlier repairs if ignored. A faulty oxygen sensor means your vehicle is emitting more pollutants and if the check engine light is illuminated, it may not pass vehicle emissions testing in those states requiring it for vehicle registration.

A vehicle's oxygen sensors are mounted in the exhaust system; they monitor the catalytic convertor's operation and the level of oxygen in exhaust gases to maintain efficient engine operation. The best way to prevent an oxygen sensor failure is to follow a regular service schedule, including routine oil changes.

Unlike the past nine years of the annual CarMD report, costly catalytic converter replacement edged out O2 sensor replacement as the most common check engine light repair. Catalytic converters do not typically fail unless maintenance and other repairs are ignored or the vehicle is older. Average vehicle age has increased from 10.6 years to 11.7 years over the past decade, contributing to this outcome.

It is important that car owners check the reason for an illuminated check engine light without delay and make necessary maintenance to avoid more costly repairs, like catalytic converter replacement, down the road. If you find your vehicle needs service, call your trusted local repair shop.

Source: Car Care Council

What People Say About Us

Warner Robins
  • reviewiconVery trustworthy and effective!
    Car & Truck Care, near Warner Robins, GA
    , 05/18/2020

    Friendly, professional mechanics that don't rip you off--a godsend in this day and age. They explain to you what went wrong and how they can fix it and give you options as far as parts go, with their own honest opinions.

  • reviewiconVery trustworthy and effective!
    Car & Truck Care, near Warner Robins, GA
    , 03/23/2020

    They make you feel like family.

Warner Robins
  • reviewiconKeep it up and don't change.
    Car & Truck Care, near Warner Robins, GA
    , 03/06/2019

    Calhoun Automotive, Bryan= Owner, has been working on my vehicles for many years, the latest being today. He has always performed in a professional manner with outstanding knowledge of diagnosing the problem. Never has he accomplished any work that was not needed. In fact he has advised not to replace an item that I thought had failed. That is true honesty. Something that is very difficult finding in todays market with attitudes of being selfish so why should I consider others. Bryan has always done what he thought was right by the customer and vehicle. Great work Bryan. Keep it up and don't change.

  • reviewiconKeep it up and don't change.
    Car & Truck Care, near Warner Robins, GA
    , 05/29/2018

    Fast, friendly and fair.

Warner Robins
  • , 05/04/2018

    Calhoun has worked on several cars of mine over the years. Great work.

  • , 05/18/2020

    Friendly, professional mechanics that don't rip you off--a godsend in this day and age. They explain to you what went wrong and how they can fix it and give you options as far as parts go, with their own honest opinions.

Call us for service: 478-929-0620

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