Can this code cause major engine damage over time? on 2000 Ford Focus

Well, i recently replaced my valve cover gasket in the vehicle and when the shop put the cover back on they didn't put on the wires correctly which is what i think caused the code to be thrown and stored in the history. Im going to clear the code and see if it happenes again because after they plugged in the wires correctly the vehicle ran fine. Felt like it did before they messed with it. So, my question stands if it is a misfire in cylinder four can that cause major engine damage over time?

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1 answer 2 comments
YES ALWAYS. DID YOU HAVE CODE PO304? CLEAR CODE AND SEE IF IT COMES BACK. P.S. FIND A NEW MECH IF THEY SHIPPED A CAR RUNNING BAD
It was in the lease agreement that the dealership i bought the car from would fix the valve cover gasket for free so that's why i took it there ha ha. but they are not my mechanics in anyway shape or form ha ha
It was in the lease agreement that the dealership i bought the car from would fix the valve cover gasket for free so that's why i took it there ha ha. but they are not my mechanics in anyway shape or form ha ha and yes the code was P0304