codes and starter questions
 

Hi everyone I'm new here , I'm having some problems first I have two Audi's a 97 a4 2.8 front wheel drive and I just got a 98. A4 2.8 all wheel drive first I'm curious can I swap the starter from my 97 to my 98 and second on my 98 its not throwing a starter code if there is one but it does throw a p1392 and p1398 also its throwing code. po102 Can anybody actually define the actually problems that need fixing as related to the codes, what needs to be fixed? Thank you for your help