* Power Steering Fluid Low or Contaminated: This is the most common cause. Check your power steering fluid level. If it's low, add the correct type of fluid (check your owner's manual). If the fluid is dark, brown, or smells burnt, it needs to be flushed and replaced. Low fluid can cause stiffness, while contaminated fluid contributes to grinding.
* Power Steering Pump Failure: The pump might be failing, unable to provide sufficient pressure to the system. A failing pump often makes whining or groaning noises.
* Power Steering Rack and Pinion Issues: The rack and pinion is a critical component of the power steering system. Worn gears, low fluid, or damage can cause stiffness and grinding. This is a more serious and expensive repair.
* Power Steering Belt Problems: A worn, loose, or broken power steering belt prevents the pump from operating correctly, leading to stiffness. Visually inspect the belt for cracks, wear, or slippage.
* Steering Column Issues: Problems within the steering column itself, such as worn bearings or binding, can cause stiffness and resistance. This is less common but still possible.
* Frozen or Seized Components: In very cold climates, components within the power steering system can freeze, leading to stiffness.
What to do:
1. Safety First: If the steering is extremely stiff or difficult to turn, do not drive the vehicle. It's unsafe.
2. Check Power Steering Fluid: This is the easiest first step. Check the level and condition of the fluid.
3. Listen for Noises: Pay attention to any whining, groaning, or other unusual noises coming from the steering system while attempting to turn the wheel (with the engine off and then on).
4. Professional Inspection: Given the grinding noise, a professional mechanic should inspect your vehicle. They can diagnose the problem accurately and recommend the necessary repairs. Do not attempt complex repairs yourself unless you have significant mechanical experience.
The grinding sound is particularly concerning and indicates significant wear or damage. Ignoring this could lead to a complete power steering failure, making your car extremely difficult or impossible to steer safely. Get it checked by a professional as soon as possible.
