The power steering fluid is low.

Add an adequate amount of power steering fluid. Refer to Steering Gear Pitman Shaft Over-Center Preload Adjustment - Off Vehicle or Checking and Adding Power Steering Fluid .

The pump belt is loose.

Refer to Drive Belt Tensioner Replacement , Drive Belt Tensioner Diagnosis , Drive Belt Tensioner Diagnosis , and Drive Belt Tensioner Diagnosis .

The flow control valve is sticky.

Replace or clean the control valve.

The pump pressure is insufficient.

Refer to Power Steering System Test .

The gear pressure relief valve is faulty.

Replace the faulty gear pressure relief valve.

The steering linkage is binding.

1. Inspect the steering linkage for worn components.
2. Replace any worn components.