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O2 sensors - what do they do????
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<blockquote data-quote="zidee" data-source="post: 501818" data-attributes="member: 20151"><p>From Mr. Wiki :</p><p></p><p>"Normally, the lifetime of an unheated sensor is about 30,000 to 50,000 miles (50,000 to 80,000 km). Heated sensor lifetime is typically 100,000 miles (160,000 km). Failure of an unheated sensor is usually caused by the buildup of soot on the ceramic element, which lengthens its response time and may cause total loss of ability to sense oxygen. For heated sensors, normal deposits are burned off during operation and failure occurs due to catalyst depletion. The probe then tends to report lean mixture, the ECU enriches the mixture, the exhaust gets rich with carbon monoxide and hydrocarbons, and the fuel economy worsens. </p><p></p><p>Symptoms of a failing oxygen sensor includes:</p><p>Sensor Light on dash indicates problem</p><p></p><p>- Increased tailpipe emissions</p><p>- Increased fuel consumption</p><p>- Hesitation on acceleration</p><p>- Stalling</p><p>- Rough idling"</p></blockquote><p></p>
[QUOTE="zidee, post: 501818, member: 20151"] From Mr. Wiki : "Normally, the lifetime of an unheated sensor is about 30,000 to 50,000 miles (50,000 to 80,000 km). Heated sensor lifetime is typically 100,000 miles (160,000 km). Failure of an unheated sensor is usually caused by the buildup of soot on the ceramic element, which lengthens its response time and may cause total loss of ability to sense oxygen. For heated sensors, normal deposits are burned off during operation and failure occurs due to catalyst depletion. The probe then tends to report lean mixture, the ECU enriches the mixture, the exhaust gets rich with carbon monoxide and hydrocarbons, and the fuel economy worsens. Symptoms of a failing oxygen sensor includes: Sensor Light on dash indicates problem - Increased tailpipe emissions - Increased fuel consumption - Hesitation on acceleration - Stalling - Rough idling" [/QUOTE]
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