Your symptoms are pretty much what I experienced with my accelerator pedal failure. As I found out and explained in one of the previous posts, the accelerator pedal has two Hall Effect sensors. When the main one fails the second one kicks in and I assume that’s the limp mode we experienced.
If your codes come up as the same that’s mine were then it’s strong possibility that it’s the pedal. Needswings has the correct pedal (at least it’s on the website.

It’s an easy replacement except for a washer that was difficult to get out, it was causing the pedal to hang up. Good luck whatever it is!