1. Low Power Steering Fluid:
Check the power steering fluid level. If it's low, refill it and see if the noise goes away.
2. Worn Power Steering Pump:
If the power steering pump is worn out, it can create a grinding noise when you turn the wheel.
3. Damaged Steering Rack:
If the steering rack is damaged, it can also cause a grinding noise when you turn the wheel.
Note:
It's crucial to have your vehicle inspected by a mechanic to pinpoint the exact cause of the grinding noise and suggest the appropriate repair or replacement. Safe driving!