For 1990-2009 cars

Condition | Action
--- | ---
The power steering fluid level is low. | Add fluid to the power steering system. Refer to Refilling the Power Steering System .
The power steering pump pressure is insufficient. | Repair or replace the power steering pump. Refer to Power Steering Pump Replacement .
The power steering gear or the power steering pump has an internal leak. | Repair or replace the appropriate component as necessary. Refer to Power Steering Pump Replacement or Steering Gear Replacement .
The steering gear valve spool is sticking/damaged. | Repair or replace the power steering gear as necessary. Refer to Steering Gear Replacement .