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.
"Once good behavior becomes the exception and not the rule your society has begun to fail…..we are there." laybackman
Life is like a coin. You can spend it any way you wish...but you can only spend it once.
"If we cannot afford to take care of Veterans, then we should stop making them."
David C. Wilker Jr. USAF (RET)