If all else fails, suggest:
If you customized your boot menu, you might have a launch option (like "CFW - sysMMC") that has broken paths. pkg2 read failed failed to launch hos
If I find a solution on my own, I'll be sure to post it here for future reference. If all else fails, suggest:
This error — pkg2 read failed failed to launch HOS — typically appears on Nintendo Switch custom firmware (CFW) setups, especially when using Atmosphère or Hekate. It means the bootloader couldn’t read the package2 file (which contains the kernel and system modules), so it cannot launch the Horizon OS (HOS). If you customized your boot menu, you might
Below is a helpful diagnostic and troubleshooting feature you could implement in a tool like a Hekate GUI, a PC-based SD fixer, or a troubleshooting assistant.
Once your Switch boots again, follow these rules to never see the "pkg2 read failed" screen again: