Why is my Kia Niro engine revving up and down?

I recently purchased a used Kia Niro and I've noticed that the engine seems to rev up and down while idling. It's not a constant rev, but more of a sporadic fluctuation. Is this something I should be concerned about?

This could be a sign of a potential issue with your car's idle control system. It's always best to have a professional mechanic take a look at your car to diagnose and fix any issues before they become more serious.

It's always a good idea to have your engine checked out if you notice any unusual behavior. It's possible that there could be an issue with the fuel system or air intake. I would recommend taking your car to a trusted mechanic for a proper diagnosis and potential repairs.

I'm no expert, but from personal experience, I've found that sometimes a simple tune-up can fix this issue. I would recommend taking your car in for a routine maintenance check and see if that helps improve the engine fluctuations.