Check engine problem

Hi, I've been a happy eos owner for a year. I haven't had any problems until today and I need your help. My problem is the check engine light and two errors, the engine has been working unstable for some time and as if unevenly, the vibrations are transferred to the seats while driving, they are not felt, but at a standstill with the engine on, the seats shake. I changed the coils and spark plugs. The check engine light goes out from time to time and appears again was connected to the computer but the errors are still there. The car has power and drives normally but I feel discomfort with transferring vibrations to the seats I know that the engine did not work in such a way