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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

  • , 07/06/2020

    My classic car broke down in Bloomington. I live in Champaign (48 miles away). This car (a 1972 Cutlass Supreme convertible) almost never is more than 10 miles from home and has spent all but 2 nights in the past 25 years in my garage. To say I was anxious leaving it at an unknown, out of town repair facility would be an understatement. Zaabs and Bryan handled the repair quickly and very affordably. 5 stars! A good outfit that has earned my respect.

  • Went in for my breaks, amazing place! Great service, nice guys got it done fast.

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    Thanks for getting our '92 Pontiac back on the road. Very affordable & quick service.

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    I brought my truck into Zaabs and they were quick and helped me understand exactly what they were doing. I finally found a mechanic here who I can trust.

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    After a different repair shop's service manager boldly lied to me about how an expensive repair was diagnosed, I took my car to Zaabs. The actual diagnosis and proper repair by Brian was 10% of the other shops alleged "repair". I fully recommend Zaabs.

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    Called about getting the motor from my passenger window replaced. Brought it in the same day and the next day my window had been fixed and replaced. Quick and friendly service. Thanks!

Call us for service: 309-386-1999

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