Just got a brand new H8-AGM battery from Advanced Auto Parts. Same problems. I also flashed back to the literal stock file on my car.
Currently:
2A9E - DME: Camshaft sensor, inlet, synchronization
2A9F - DME: Camshaft sensor, exhaust, synchronization
2ABD - DME: Boost-pressure sensor, overrun (this is new, maybe due to the 3.5bar tmap
2ACB - DME: DME master relay, activation (I thought this was due to the trans fan I added to the DRLs, but I'm beginning to wonder more)
2CFB - DME: Throttle-valve adaptation value
2D09 - DME: THROTTLE.
2DEB - DME: Power management, vehicle electrical system
3100 - DME: Boost-pressure control, deactivation
Also a couple codes for the fuel level sensors because they are unplugged.
I was getting a buzzing from the HPFP, but it turns out that is because my LPFP was unplugged for all the work I was doing and the HPFP needs fuel pressure apparently or it makes a buzzing sounds. Figured that one out courtesy of an old post by
@The Convert