The power steering system in your vehicle enables you to steer your vehicle in the direction you would like it to proceed. Power steering is really "power assisted" steering. "Power assisted" steering will allow you to steer your vehicle manually when the engine is not running or if you have a failure in the power steering system which disables it.Power steering utilizes a hydraulic pump running off a belt driven by the engine, this pump enables a small amount of fluid to be under pressure. This pressure in turn assists the steering mechanism in directing the tires as you turn the steering wheel. The power steering system typically includes a pump, power steering fluid, a pressure hose assembly, a control valve and a return line.