https://www.evga.com/support/manuals/files/111-SS-E172.pdf
 
I'm not sure what the issue is as the 0C-OD codes are reserved for future AMI SEC error codes
 
 
At least according to that manual.
 
Try totally resetting BIOS? Take out the Button battery, go out buy a new one, plug in the new battery ...should be reset at that point.
 
 

I purchased a cheap used board, i5 6600 is working. I can safely confirm the EVGA Z170 Stinger motherboard is the problem
 
Would anyone have any suggestions what I could do going forward before scrapping the board?
So far I've tried:
- Reseating functioning RAM, using different functioning RAM in all combinations possible
- Swapping functioning CPUs (i3 6100 & i5 6600)
- Clearing CMOS
- Replacing CR2032 battery (both checked with a meter confirmed at 3V)
- Cleaning (using mass airflow sensor cleaner) bios chip socket and reseating bios chip
- 2 different functioning power supplies
- Checking CPU pins, they seem ok
 
If I remove the CPU from the socket and boot the motherboard, I get 'C' error. Good.
Else anything else I do - error code '0d', flicks to 'C' for a moment, then back to '0d'. 
 
Is there a way to reflash the bios in this state? Else would a bad bios chip cause the board to behave this way?
 
Thanks

Solved. Hopefully this helps someone in the future.
Corrupt BIOS. Got a CH341a USB chip reprogrammer from China, erased old bios, flashed new bios.
All working now.

EVGA, why manufacture a board with a removable BIOS chip and not offer replacements?