You may have a bad conection. You could also have a cat converter that is failing and has broken up some. every time you hit a bump a piece clogs your exhaust and that sets offf the DTC and lights up your CEL.
A clogged cat at night will even glow in the dark after a long run on the highway.
Senators and Congressman should wear uniforms like NASCAR drivers so we could identify their corporate sponsors....
If what doesn't kill you, makes you stronger, I should be able to bench press a Grand Cherokee by now!