The steering wheel gets a little bit harder in my 2009 KIA Rio, the steering oil is full, what is the problem?and how can I fix it?

wiggle steering wheel up and down sometimes the steering lock tab jams and wont permit key to turn ====if key worn down will not let ignition cylinder turn other is bad ignition cylinder

if you have the wheel on full lock then the bypass valves in the pump or steering box are activated to prevent steering and pump damage They will make a noise at this point
go to full lock then when the noise starts back off a bit and if it stops then that is the valves
if not take it to an accredited power steering shop for a diagnosis.

Jack it up and try moving the wheel in and out at the top and bottom, and again left to right. If there's movement, you should be able to isolate it to a ball joint, A-arm bushing, or a wheel bearing (though the entire front suspension should have been checked while changing out the rack).

you can see it on the passengers side closest to wheel on rear side of motor,some people remove right front wheel,for eazy access .

Carefully remove the bolts at the rear of the steering wheel and remove the plastic covering then you should be able to disconnect the wiring and then the steering wheel, you may need a puller assembly if the steering wheel is difficult to remove

disconnect your battery there are some screws on the back of the steering wheel remove these this will remove the air bag diconnect the electrical wire then there is a nut remove this then you need a steering wheel puller theses are available for rent thru auto zone for a small deposit which is returned to you after use this will get the job done hope this helps

see the diagram attached and fix it. test any wires loose+corroded+test the fuse+ the relais with VOM +button for dirty or faulty, and+horn itself for loose wires , adjust the screw for soudn.God bless you

Okay, I just had this same problem with my 2009 Kia Rio and I did this. So not to down everyone's post on here -- everyone is correct -- by turning the steering wheel back and forth and turning the ignition key at the same time is a correct method. However, after talking to a Kia Serviceman, he told me you have to do it hard -- meaning turning it violently back and forth hard (madman style). In order to do this operation, I had my wife sit in the driver side and turn the key while I was on her left side grabbing the steering wheel and violent moving it back and forth like a madman, and after about 2mins of doing it the key turned over -- problem fixed. Do not worry about breaking anything; turning the steering wheel violently hard is a must -- this was told to me by a Kia service Rep. Remember -- have someone assist you; either turning the key or violently turning the steering wheel back and forth. Hope this works for you!!!!!

they are not very good these modern horns ,they stick up so what i do is i find the horn behind the front bumper then i oil the vibrating bit on the front with engine oil leave to soak in for a day or so then assistant holds horn on and i tap it with a small hammer works most of the time

The kia rio uses rack and pinion steering, which does not use an idler arm. Did someone tell you you had an idler arm?

For cars that have classical steering designs, the idler arm is a part of the steering linkage that makes the front wheels turn about the same on both sides. Actually, the wheel on the side of the turn turns a little bit more. The idler arm is necessary for the wheels to turn properly. When the joints in the idler arm wear out, the right wheel is allowed to move back and forth on it's own. This causes vinration, excess tire wear, and possibly an unsafe steering condition if the wear is excessive. .