Your power steering pressure switch plays an important roll in your engine compartment. When it's working properly, the power steering pressure switch tells your car's brain to adjust the idle speed or turn off the air conditioner if you put a heavy load on the pump. When it's not working, your power steering pressure switch can actually lead to stalling out and pump hissing. When you need to replace your power steering pressure switch, AutoAnything is your source for quality parts at discounts that are deeper than French novels.