- Check the power steering fluid level and add more if necessary. The power steering fluid reservoir is located in the engine bay, near the power steering pump.
2. Faulty Power Steering Pump
- If the power steering pump is not working properly, it will not be able to provide the necessary pressure to the power steering system. This can cause the steering wheel to become difficult to turn.
3. Faulty Power Steering Rack
- The power steering rack is responsible for converting the rotational motion of the steering wheel into linear motion that turns the wheels. If the power steering rack is damaged or obstructed, it can cause the steering wheel to become difficult to turn.
4. Faulty Power Steering Belt
- The power steering belt is responsible for driving the power steering pump. If the power steering belt is broken or damaged, it will not be able to drive the power steering pump and this will cause the steering wheel to become difficult to turn.
5. Faulty Power Steering Control Valve
- The power steering control valve is responsible for regulating the flow of power steering fluid to the power steering rack. If the power steering control valve is faulty, it can cause the steering wheel to become difficult to turn.
If you are experiencing a loss of power steering in your 1991 Lexus LS400, it is important to have the vehicle inspected by a qualified mechanic to determine the cause of the problem.
