Is it running rough at idle? If you clear the faults, do they come back right away? If yes to both, then I agree with Old Dogger. If not, sometimes multiple misfire faults are logged when only one cylinder has an issue. Your scanner may be able to display number of misfires logged per cylinder. If one cylinder has significantly more misfires than the rest, you can try swapping coils easily to see if the issue follows the coil. If not, you can try the same with spark plugs.