A groan when you turn, worst at parking speed. Low fluid or a tired pump.
Low power steering fluid, air in the system, or a worn pump.
Check the fluid first. Groan plus a low reservoir means find the leak, not just top it up.
Reading about sounds only goes so far. The tuner on our home page listens in your browser and tells you what it hears. The app goes further: it names the exact fault, checks it against your vehicle, and tells you how urgent it is.