* Low power steering fluid. If the power steering fluid is low, it will not be able to provide the necessary pressure to assist with turning the wheels. Check the power steering fluid level and add more if necessary.
* Faulty power steering pump. If the power steering pump is not working properly, it will not be able to generate the necessary pressure to assist with turning the wheels. Have the power steering pump inspected and replaced if necessary.
* Binding in the steering linkage. If there is any binding in the steering linkage, it will make it difficult to turn the wheels. Check the steering linkage for any loose or worn parts and replace them as necessary.
* Worn steering rack. If the steering rack is worn, it will make it difficult to turn the wheels. Have the steering rack inspected and replaced if necessary.
If you are still having trouble turning your steering wheel, you should take your vehicle to a qualified mechanic for further diagnosis and repair.
