82k 2015 6.4 check engine light. I dropped it off at the dealer, don’t judge, and it is bank one sensor one. It is taking days to get one. I did the usual online tour of the parts houses. I saw out of stocks for sensors or no listings for bank 1 sensor 1. This is the first real problem I’ve had since new so I can’t complain too much. I do wonder about the shortage of O2 sensors. Anybody else have a similar problem?