* Air in the power steering system. If there is air in the power steering system, it will cause the steering to be hard. This can happen if the power steering lines have been disconnected or if the power steering pump has been replaced. Bleed the power steering system to remove any air.
* Faulty power steering pump. If the power steering pump is faulty, it will not be able to generate enough pressure to assist the steering. This can be caused by a number of problems, such as a worn out pump, a faulty pressure relief valve, or a clogged filter. Replace the power steering pump if it is faulty.
* Worn out steering rack. If the steering rack is worn out, it will cause the steering to be hard. This can be caused by a number of problems, such as excessive wear on the steering rack teeth, a faulty steering rack pinion, or a leaking steering rack seal. Replace the steering rack if it is worn out.
* Other problems. Other problems that can cause the steering to be hard include a loose or damaged serpentine belt, a faulty tensioner pulley, or a problem with the steering column. If you have checked all of the above and the steering is still hard, you should take your vehicle to a qualified mechanic for diagnosis and repair.
