1990 Jeep Cherokee would a oxegen sesor

1990 Jeep Cherokee 6 cyl Four Wheel Drive Automatic

would a oxegen sesor make my jeep stink of gas inside the light is on for the emmion matanace but there is a really strong smell inside the jeep it smell like gas fumes to me it happen when my wife used the jeep to pull our camper she used the 4 wheel drive and said that it got stuck in 4 wheel drive and had to drive it home but that she could smell that smell and it sound like somthing broke I changed the axxel shaft and ther is nothing broke the truck drives fine but when you push the gas to take off it hassites alittle at first but I still smell the sticky gas smell and the jeep burn alot of gas alot more then it ever did before