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.
"Taking care of our veterans is a cost of war. If you can spend six trillion dollars sending people to war, you can spend a few billion dollars taking care of them when they come home"
Sen. Bernie Sanders (I-Vt.)
If what doesn't kill you, makes you stronger, I should be able to bench press a Grand Cherokee by now!