If you dick with the placement of the air intake temp probe, you can trick the car into thinking the air inlet is colder than it really is. This will cause the car to enrich the mixture. When that rich exhaust gets to the O2 sensor, it senses the rich condition and trips the CEL.Question, out of the people having issues with CEL and running RICH. How many are ATX vs MTX.
I read on another site that an MTX owner was having nothing but issues with it running RICH.
One other observation is I would never think an intake would create a RICH condition, LEAN hell yeah. If you are getting a RICH condition, I would think that your car is losing power.