AFM / DFM disable

I have a 2011 Cadillac Escalade with AFM. I have been told by "everyone" to disable it. So I bought a plug in AFM/DFM disable tool. It is on of those deal that you plug into your OBD port and it turns that off. I ran it for a couple of weeks, it works great, the truck is smoother and seems to be very happy. 

I go to get a NYS inspection, local indy place, I have known the guys my whole life. They say hey this failed because all the monitors were open. Yep every one of them, like I had just reset all the codes. Does anyone know how these things actually work? A theory I have is they continually clear the monitors and then the AFM won't turn on because it has a fail safe not to turn on if the monitors aren't ready. I pulled it and drove it and everything reset fine. Mine is a chinese rip off one from Amazon, I have a friend that has a range technology one and I am going to have him check his monitors and tell me if they are cleared but the peeps here always seem to know.

so why not just re enable the AFM, do your pointless inspection, then put the unit back on?

In reply to camopaint0707 :

That's already done. I'm just trying to understand exactly how the thing works. If it constantly clears the monitors then it can't learn and adapt to things wearing. More importantly to me is it won't throw CEL's. That's something I want it to do. Deferring maintenance never really seems to work out. If it has a bad O2 sensor or something I want to know. 

Ah, gotcha.  That's fair.  I was always under the impression they just disabled the mechanical part that engaged the afm.  Now it sounds like it's controlling it all the way back at the ecu, with is a little more involved for usre.