Posting detailed descriptions of the codes involved would help. Some codes are manufacturer defined so getting a code list for the actual car in question is a must.

No one has every code memorized and posting detailed descriptions shows the person is taking an active role in learning rather than just Googeling it for a " change this part" fix.

Some codes can be the result of a failure covered by an earlier code or could be left over from past corrected failures.

Factory manuals have detailed diagnostic procedures for each code. this is the best place to start.