I hear you on the tuning complexity these days. I can’t say that I feel 100% sure of anything other than factory tuning because I’m picky. The last thing I tuned was a ‘13 Mustang and 4 different tuners, including different software/hardware’s from reputable places and they couldn’t make it run well, to the point it was a mechanical liability, with only minor NA bolt-ons for a drag racing application. Took the tune out and it ran better engine and transmission-wise.Not really sure tbh. All I know is if you did the TS BOV mod on a Raptor without a tune, you'd get a similar code as the Jeeps get. I believe it might be assuming there's a leak somewhere since it is venting some of that air to the atmosphere, rather than fully recirculating. The GFB might not throw a code, but imo my CAI won't throw a hard code (shows on the dash), but if you go into the history it shows that one was thrown. I think the GFB will throw a code no matter what eventually, as it may be for a split second like my CAI code throws a lean code for a brief moment based off of a specific driving condition experienced. On my hellcat I used to have, I ported the stock throttle body & if you went 100% throttle & then immediately let off it'd throw a code for a brief second because the throttle body didn't close as fast as it did unported. These newer vehicles are very finicky & it's most likely a non-issue, but the computer will put it into limp mode & that's what becomes the issue. Also, my OCD doesn't allow me to ignore check engine lights very well.
Perhaps with no bolt ons and modest power increase I’ll try again after a few others try.