For 1990-2009 cars

Checks | Action
--- | ---
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.