I have the same problem with the AFE stage 2. AFE says out of the 4500 units shipped they have had 89 reported engine light problems. They sent me an "improved" filter and the light went out for about 5 miles. From what I understand the intake kit I installed has a larger intake tube wich flows a larger volume of air. The problem is the velocity of the air is not fast enough. AFE states they are diligently working on a fix to increase the velocity. It doesn't seem like it should be that difficult since they are a pretty large company specializing in Air Intakes. Hopefully they fix it soon cause I'm getting pretty tired of explaining to passengers why the engine light in my brand new truck is on.