If you live in an area where emission testing is not required, just ignore these CEL codes because they will eventually come back a year after fixing it.There are a couple youtube videos on the subject if you look carefully.
Usually, a worned tie rod end can cause similar symptoms. Steering can become sloppy and imprecise,the wheels can vibrate at certain speed.Symptoms are a bit similar to out of balance wheels.
Well, the good news is that you can buy the Permatex putty to repair your tank.You don't need any epoxy clothes with this one and it even work if the area is saturated with gasoline.If you live in Canada, Canadian Tire has it
https://www.canadiantire.ca/en/pdp/fuel-tank-repair-putty-0383701p.html
Using car putty on a bumper to repair a crack is a waste of time because the bumper cover is flexible and this putty will crack in no time. Proper repair involves a plastic fusion technique that will permanently seal the crack.You need a body shop for this. Since bumper covers are not expensive...