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Plugs are a cheap and easy fix, so do it anyway. If it still has issues, pay a garage to look at it - they'll probably find the source error code which is triggering all the others (we hope). For better info, we'd need a list of all the codes found.


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Maybe a leaking injector High CO is typically rich but your lambda says otherwise - I'm unfamiliar with your exact testing (England? - Petrol what is that? :) ) so I don't know what it means. I typical lambda sensor (oxygen sensor) averages about .5 volts and swings wildly at idle. They way you know its working is the swinging back and forth). A too rich ...


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