I have to turn full steering wheel either right or left, my car generates sounds like che che che?

If this is only happening when the steering is on the lock either left or right, it sounds like the power steering pump straining to keep the pressure up.

Basically at these extreme points the power steering pressure is at the highest. This is the point that if the pump is weak it will make noise. So I suspect this is either normal as this is just the pump making the noise or the pump is starting to fail and making noise.

https://www.2carpros.com/articles/power-steering-problems

https://www.2carpros.com/articles/how-to-replace-a-power-steering-pump

If you can get a video of this noise then that will help us make sure that everything is ok. If not, you can try and flush the fluid and see if there was air in the system.

If none of this works then I suspect there is a power steering pump issue and it will need to be replaced.

Below is the info from the manual that will help with this.

Please run through this and let us know if you have other questions.

Thanks