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Check Engine Light On? Could Be A Faulty O2 Sensor

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  • Mon 8:00AM - 5:00PM
    Tue 8:00AM - 5:00PM
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  • Fri 8:00AM - 5:00PM
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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

Chattanooga
  • reviewiconFast and Courteous
    Electrical Services, near Chattanooga, Tennessee
    , 02/05/2020

    Had a dead battery a few blocks from the shop, the guys came and jumped my dead battery off so I could make it to Maxi for a new one! Awesome customer service! :)

  • reviewiconFast and Courteous
    Electrical Services, near Chattanooga, Tennessee
    , 01/13/2020

    Great place! Friendly and helpful staff. Stopped in from out of town when our local shop from home screwed us over with a bad battery, these guys took care of us and our car better than ever! Highly recommend!

Chattanooga
  • reviewiconBest Repair Service
    Engine Maintenance, near Chattanooga, Tennessee
    , 12/25/2019

    Had a maintenance light come on, the employee that helped me was friendly, checked on my car in the parking lot free of charge. It was easy and simple.

  • reviewiconBest Repair Service
    Engine Maintenance, near Chattanooga, Tennessee
    , 11/12/2019

    I came here in a bit of a situation. My radiator hose broke apart as I was driving down the interstate. First, I took my car to Firestone and found they were charging ridiculous prices to fix this issue. I then brought my car here and Steven was extremely helpful and got my car in and out In a great amount of time and came in about $100 cheaper than Firestone. Would definitely recommend for anybody in a situation like I was!

Chattanooga
  • reviewiconLocal Mechanics
    Car & Truck Care, near Chattanooga, Tennessee
    , 07/10/2019

    Best prices in the area and excellent, cheerful, FAST service. The battery and alternator in my 2007 Ford Focus died while I was traveling between Alabama and North Carolina. I sat at a coffee shop and did extensive research on the best price for a mechanic all up and down the highway between Ooltewah and Chattanooga. I must have called 15 places. Patrick at Maxi gave me the best price, by a long shot. Furthermore, he and his team squeezed me in at the end of the day on a Friday so that I could get on the road. I was blown away by the excellent pricing and superior service. If you're looking for a fairly-priced, high quality mechanic in this area, this is it.

  • reviewiconLocal Mechanics
    Car & Truck Care, near Chattanooga, Tennessee
    , 02/05/2020

    Had a dead battery a few blocks from the shop, the guys came and jumped my dead battery off so I could make it to Maxi for a new one! Awesome customer service! :)

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