So I bought an elm327 interface and doped out what I had to do to stop the backup beep. Worked like a charm a month ago. So happy! Then this morning I got in, moved the shifter to R and suddenly the beep is back. Anyone else had this or have any idea why it happened?
Nope. Had the situation with the gen II and it turned out to be loose battery connection, but this is a one month old car -- also it didn't reset the clock or anything else. Seat belt warning settings remained as I set them at the same time as the backup beep. Oh well.