The pump vanes are sticking in the rotor slots.

Free the pump vanes by removing any burrs, varnish, or dirt.

The power steering gear inlet (pressure) hose is touching other parts of the vehicle.

Check and adjust for proper mounting and clearance.

Refer to the following procedures:

1. Power Steering Pressure Pipe/Hose Replacement
2. Power Steering Pressure Pipe/Hose Replacement
3. Power Steering Pressure Pipe/Hose Replacement