03 yukon xl denali o2 sensor readings

[Timc9516]

The other day I was on my way back from vacation when the wife said the floor was hot. When I got home and pulled the Mat it was steaming and damp. I dried the area and it hasn't been wet since. Probably from when I stupidly left the sun roof vented overnight and it rained. But the floor still seems too hot. I didn't get a chance to check the temp till a half hour after I got home today and the truck was idling while I did some stuff to the truck. But the floor was at 104. I'll check it again when I get to work. But looking at the o2 sensors I have some questions. At idle after a 25 min drive to work bank 1 sensor 2 voltage was at 703 mv and bank 2 sensor 2 was at 160 mv my understanding was these should be relatively close with the upstream jumping up and down. Any thoughts on this?