Ya @TonyP ... Funny you mention that, because yesterday I picked up another code reader...as my truck threw codes again yesterday morning...TEN codes, to be exact! -And all 10 were related to the evap filter reporting a leak. And...I also noticed that my "click" on my gas cap feels iffy at best. I'm betting that's all it is. Interestingly, the codes only seem to register after sitting over-night. So maybe the heating/cooling vacuum/pressure thing is being picked up as a leak...? Gonna order a new cap and see. Meanwhile, clearing the codes is easy, and everything operates as normal afterward...
Yeah, yesterday was when mine popped back up too in the AM. Weird. We're definitely having the same issue whatever it is. The frequency (yours and mine keep popping up at the same time) makes me believe it's a calibration issue/warning type thing. Unless both of our caps s*** the bed at the same time.