The power steering fluid level is low.

Add fluid to the power steering system.

Refer to Checking and Adding Power Steering Fluid .

Inspect the power steering system for leaks.Refer to Power Steering Gear and Pump Leaks .

There is high internal leakage.

Refer to Power Steering Gear and Pump Leaks .

The power steering gear valve spool is sticking or damaged.

Refer to Steering Gear Replacement .

The power steering pump pressure is insufficient.

Inspect the power steering pump. Refer to Power Steering System Test .

Replace the power steering pump. Refer to Power Steering Pump Replacement .