Why is my Ford Focus experiencing a rough idle?

I recently purchased a 2020 Ford Focus and have noticed that it has a rough idle when stopped at a stop light or in traffic. The car also seems to shake and vibrate at low speeds. What could be causing this and how can I fix it?

Your Ford Focus may be experiencing a rough idle due to a variety of reasons. One potential cause could be a malfunctioning idle air control valve, which regulates the amount of air that enters the engine while idling. Another possible reason could be a dirty air filter, which can restrict airflow and cause rough idling. It's best to take your car to a certified mechanic to diagnose and fix the issue.

I had a similar issue with my Ford Focus and it turned out to be a problem with the spark plugs. They were worn out and needed to be replaced. I recommend having your spark plugs checked and replaced if necessary.