Check the power steering pump for internal leaks and overflow.

Replace the power steering pump.

Check the hoses for damage or restricted flow.

Replace the power steering hoses and pipes.

Check the power steering fluid level.

Fill the power steering fluid reservoir.

Check the power steering pump flow control valve for sticking and improper operation.

Replace the power steering pump.

Check the power steering pump seals for wear.

Replace the power steering pump.

Check the pressure plate, the pump ring, the thrust plate, and the rotor for scores, cracks, or breaks.

Replace the power steering pump

Check the vanes for sticking in the rotor slots.

Replace the power steering pump.