Cylinder 6 misfire after hitting a pot hole. Error messages on FIXD.

Hello, I do not see any possible reasonable correlation between hitting a pothole and a misfire code. The P0455 code could be from a fuel cap not fastened, for example, but could be another large leak that would seem to be physically verifiable. Your EGR flow concern would seem to be not related to a pothole either. Diagnostic testing is required to get to the bottom of all concerns.

The egr valve tube could be plugged. There are 2 bolts at the manifold you can remove to inspect that. The large leak after a pothole could be an evap line that broke. Use this link to find a good shop near you. https://repairpal.com/repair-shops Alex