Not necessarily. By that logic the Injen filter should give a CEL cause it is an oiled filter just like the K&N. The oil has little or nothing to do with the CEL. As soon as i put the lid back on the intake the light went away, with the K&N still there. I had run it w/ the cover before removing it as well. I only removed the cover for more sc whine.

If you leave the stock airbox on and just remove the bottom cover you have air coming in from 2 directions and this can cause the MAF to read funny.

 

as far as I know non of the intakes have been 100% cel free

 

Hasn't been an issue on mine unless the filter is soaking wet.

 

I started a new thread with vids if you guys are interested. Heres the link:

https://www.cobaltss.net/forums//showthread.php?t=14979

 

that aem is a rip off, i paid 192 shipped for my aem to find out it was a filter and a 3 inch tube. and it made my cel come on too, so i'm feelin double screwed