So I got a 2006 honda civic lx .. A few months ago I put a cold air intake on .. It's an aem has the sensor and everything I reset the ecu and everything that it tells you to do so you won't get the check engine light .. But yet I still get it ... And I need to pass a smog test this month so I need it gone .. The light hasent been on for over a month because I read the code it thru and it said system to lean but doing research I seen that a fuel treatment might help because it could be dirty fuel injectors . Anyways after I did the treatment the check engine light stayed off for over a month! Until todayyyyy ... I'm hoping it goes off out of no where like it use to but I'm seeing if anyone has this problem or knows how to fix it ? Without me having to put the stock back on .. All the hoses are connected and everything's all good on it ..