Hyundai Repair Questions? Ask a Mechanic for Answers ASAP
The vehicle running rough could have ruined the catalytic converter. You can try a burn out procedure to clean the converter which requires disconnecting one of the coils and holding rpms at about 3000 rpm for 5 minutes then reset code again. If that doesn't help you will need to replace the catalytic converter. Let me know if you have more questions, thanks.
The unburned fuel will go into converter and burn out any foreign debris, it is the only thing you can try before replacing converter. Let me know if you have more questions, thanks.