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I have a civic hx and i am going to put a dc sport header on it and on the HX models there is a cat on the stock exhaust man. and there are two O2 sensors, one b4 the cat and on after the cat and i dont know what to do with the extra o2 sensor cuz the engine light will go on if i dont do anything with it, there is only one are to put the o2 sensor on the header. Does anyone have any sugestions on what to do???
 

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yep....ran into the problem with my hx....got two options....extend the wires and run the second o2 sensor back behind the new cat and go to an exhast shop so they can put the fitting in there to hold it....or get an o2 simulator...I went with the simulator....was about 30 or 40 bucks and saved the hassle
 
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