* Low power steering fluid. If the power steering fluid is low, it can cause the pump to cavitate and make a grinding noise. Check the power steering fluid level and add more fluid if necessary.
* Worn power steering pump. If the power steering pump is worn, it can also cause a grinding noise. The pump may need to be replaced if it is worn.
* Damaged steering rack. If the steering rack is damaged, it can also cause a grinding noise. The steering rack may need to be replaced if it is damaged.
* Worn tie rods. If the tie rods are worn, they can also cause a grinding noise. The tie rods may need to be replaced if they are worn.
* Bad wheel bearing. If the wheel bearing is bad, it can also cause a grinding noise. The wheel bearing may need to be replaced if it is bad.
If you are not able to identify the source of the grinding noise, it is best to take your car to a mechanic for diagnosis and repair.
