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An additional consequence of any oxygen sensor failure may be damage to the catalytic converter.A rich operating condition causes the converter to run hotter than normal.If the converter gets hot enough,the catalyst substrate inside may actually melt forming a partial or complete blockage.The result can be a drastic drop in highway performance or stalling because of a buildup of backpressure in the exhaust system.If you're not sure how to exactly change your sensor,i suggest have the dealer to do it for you.
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