I just changed all six plugs in my truck. now have a misfire in cylinders 2 4 6 on 2002 Dodge Ram 1500

cylinders 2 4 & 6 are the only cylinders misfiring. The other code that pops up has to do with the o2 sensor. Also noticed the old plugs were burning a little hot. What's the problem? What makes only that side start misfiring? Is it the cat and o2 sensor problem? Or the coils?

Asked by for the 2002 Dodge Ram 1500
Sounds as if you either bump 3 plugs installing and closed the gap OR you've crossed the wires if you didn't remove one at a time. Good luck.