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<blockquote data-quote="huskar3399" data-source="post: 614462" data-attributes="member: 25472"><p>Theoretically it should bring the combustion back into optimal state. Because when we have faulty o2 sensor the reading given to computer box that control engine performance would be wrong and consequently creates rich/lean mixture. That could lead to misfire etc. I read somewhere if the mixture is rich it could damage the CAT. Maybe because of the unburned mixture pollutes the CAT. </p><p></p><p>That's my understanding lah. Perhaps other sifus would know better. </p><p></p><p>For me I am still observing my CEL. So far I did not return as I test drive yesterday. Hopefully it would stay that way lah. Aha.</p></blockquote><p></p>
[QUOTE="huskar3399, post: 614462, member: 25472"] Theoretically it should bring the combustion back into optimal state. Because when we have faulty o2 sensor the reading given to computer box that control engine performance would be wrong and consequently creates rich/lean mixture. That could lead to misfire etc. I read somewhere if the mixture is rich it could damage the CAT. Maybe because of the unburned mixture pollutes the CAT. That's my understanding lah. Perhaps other sifus would know better. For me I am still observing my CEL. So far I did not return as I test drive yesterday. Hopefully it would stay that way lah. Aha. [/QUOTE]
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