I have the same three codes. Did you find a solution? What was the answer?

f***in s***ass chatgpt bot

The TT guys I know pretty much all reflash with internet ROMs until they find one that works.   I know a TT running a G4x and still TT.

Like nominally yes, but if a TT Leggy has made it to 2026 without letting go then it's probably fine.   I don't think a single human has ever put a Link in a Legacy and kept it twin turbo, ha.

It’s pretty much mostly the twin turbo legacy’s that don’t like regular fuel that everyone has to flash or they knock. The Impreza seems fine without 100 octane fuel.   But the G4x can run the twin turbo if you want tho spend that much. It’s a big jump from $50 for chip you can edit to $2000 for a link.   I havent looked into the brands so it maybe a Subaru only problem. The same generation Mitsubishi cars with same controller use the common 27c series as rom. I still have a few in a box from when I wrote launch control and flat foot shifting routines for them.