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Check Engine Light On? Could Be A Faulty O2 Sensor

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


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Great, friendly service. My car needed service. I called, and they squeezed me in within the hour. Nice to have a service station you can call and have reliable work done.

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These guys are the best! Our a/c went out. 95 degrees, black car, black leather interior, an oven on wheels. Had to get it fixed, had it looked at by several shops. They all wanted at least $1000 to do the work. Austin's did the work for FAR less and even deducted the cost of the original visit to find the problem. Brought it in at 8am and picked it up the same day. So happy with their work, and highly recommend them to anyone with car issues. You can count on honest and quality. Can say enough good things about the guys.

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Here on vacation from Ohio and started having car problems. Took it to Ronnie, he checked everything out and made the necessary repairs for a more than fair price. I kind of expected to be treated like a tourist but it was more like going to my regular mechanic at home. Thank you Ronnie!

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