What type power steering do you have? Electronic power steering has no power steering pump. Hydraulic power steering has a power steering pump.
If electronic power steering, maybe you'll get lucky and it will set a code. Some of the national brand auto stores will check codes for free. I don't know if the auto store will check manufacturer specific codes?
Of course, if the power steering is hydraulic, no codes. What about the belt for haudraulic power steering? What about the pump?