MacBook Pro A2251 820-01949-A stuck on 5V

[piernov]

There is no new CD3217. Everything is at best pulled and reballed, and at worse fake. The issue is that you don't know which board and which side of the board they come from.
Pull from same location (left side to left side and right side to right side) and reball yourself from a donor with same USB-C ports configuration and you won't have issues.
If that's not enough, instead of manually reflashing the SPI ROMs (you can try if you want), you can also pull and reball the SPI ROMs, again from the same location.

[mferna14]

Thanks @pienov for the detailed explanation & for the SPI ROM re-programming I found this board to solder the SPI ROM on it & re-program them. Easily available on AE & better the spending $165 for that USB tool above which does the same job.

[Stephen]

There is no new CD3217. Everything is at best pulled and reballed, and at worse fake. The issue is that you don't know which board and which side of the board they come from.
Pull from same location (left side to left side and right side to right side) and reball yourself from a donor with same USB-C ports configuration and you won't have issues.
If that's not enough, instead of manually reflashing the SPI ROMs (you can try if you want), you can also pull and reball the SPI ROMs, again from the same location.

What he said, whenever we get a board that is A2251 we just use a donor board for a repair. We have a good few in stock and most of the time it's just one port sometimes two. We always use the exact port for this now. I would suggest looking at what Piernov said.