I have never had the check engine light come on since owning the XF for 8 months now. Literally one day after having it serviced for the transmission connector leak, the light came on. Checked out to be codes P2097 and P2098, post catyl fuel too rich on bank 1, and too lean on bank 2 (in that order). Does anyone have knowledge that would lead me to believe the 2 events are related, or is this just coincidence? I reset the codes, only to have them return tonight. Any hints on what to check? I did the normal gas cap secure check, but don't really know anything else to try.