The fluid level is low.

1. Inspect for a fluid leak.

Refer to Power Steering Gear and Pump Leaks .

2. Add fluid as needed.

Refer to Checking and Adding Power Steering Fluid .

The pressure plates are scored.

Replace the components as needed.

Refer to Power Steering Pump Replacement .

The vanes are scored.

Replace the components as needed.

Refer to Power Steering Pump Replacement .

The pump bushing is scored.

Replace the pump brush as needed.

Refer to Power Steering Pump Replacement .