I also have bought myself an Autel MaxDiag MD808 Pro. It's around $250 on Amazon, but it is a beast! Pro version has free lifetime updates for vehicles!
Thanks for the diagrams & code listings. Before I bought my Autel MaxDiag Elite ($300+ years ago) I carried half a paper clip for the 4-13 count-the-blinks trick. An important step I used was clearing all codes with the 8-taps before taking any as gospel.Note that that's from my 2011 service manual. I think that 2012 is the same.
If it is intermittent I would suspect wiring or connectors. A lot of codes have wiring harness as a possible cause.
I have copied everything from the original 16GB card to a new 32GB one, just to be on the safe side. Also left a back-up on my hardrive. Copy works fine in my reader. I might need those MaybachsIt tried to overfill my 4GB SD card so I had to remove some brands like Maybach I'll never need it for.
Hope you didn't post too soon! Maybe I should have said, "It may go and come."This is my first ever Toyota of any type and the only vehicle I have ever owned (and I have logged at least 1.25 million miles across a variety of vehicles) that has EVER healed itself.