Have not had any codes "Yet", but I just did a random scan and noticed the high fuel trims. The highest mine went was on bank 1 and it maxed out at -17. I noticed on your scans the short term fuel trim range went to -21. I think the code is set when it see's a -20, not sure but nice to know it's covered under the extension on the factory warranty under the TSB.Long terms were around -5 on bank1 and -15 on bank2. Are you getting the P0420 code on bank1?