What causes the Kia Soul's cruise control to malfunction?

I've noticed that my Kia Soul's cruise control has been malfunctioning on long drives. Sometimes it suddenly turns off and other times it doesn't maintain the set speed properly. What could be causing this issue and how can I fix it?

It is possible that there could be a problem with the electronic throttle control system. I would recommend taking your Kia Soul to a certified mechanic for a thorough inspection and repair if needed.

Another potential cause could be a malfunctioning speed sensor. This could be causing the cruise control to receive incorrect readings and not maintain the set speed. I would suggest getting this checked and replaced if necessary.

It's also worth checking the cruise control button itself. Sometimes the button can become stuck or loose, causing the cruise control to turn off or not work as intended. Try cleaning or replacing the button to see if that resolves the issue.