* Low Power Steering Fluid: This is the most common and easiest to check. Low fluid reduces power assist, making steering stiff. Check the fluid level in the reservoir and top it off if needed with the correct type of power steering fluid (consult your owner's manual). If the fluid is very dark, murky, or burnt-smelling, it needs to be flushed and replaced.
* Power Steering Pump Failure: A failing power steering pump can't generate enough pressure, resulting in stiff steering. You might hear whining or groaning noises from the pump when turning the wheel.
* Power Steering Rack and Pinion Issues: Worn-out rack and pinion components (the gear system that translates steering wheel movement to wheel movement) can cause stiff steering and poor self-centering. This often involves leaks, binding, or internal damage.
* Power Steering Hoses: Leaks or clogs in the power steering hoses prevent proper fluid flow, leading to stiff steering. Inspect the hoses for cracks, bulges, or leaks.
* Power Steering Pressure Sensor (if equipped): A faulty pressure sensor might provide incorrect readings, causing the system to malfunction.
* Steering Column Issues: While less common, problems within the steering column itself, such as binding or internal damage, can contribute to stiff steering and poor self-centering.
* Suspension and Alignment: Worn suspension components (ball joints, tie rod ends, etc.) or misalignment can indirectly affect steering feel, making it feel heavier and less responsive. This is less likely to cause *complete* lack of self-centering though.
* Tire Pressure: Improper tire inflation can make steering feel heavier.
Troubleshooting Steps:
1. Check power steering fluid level and condition. This is the first and easiest step.
2. Listen for unusual noises from the power steering pump while turning the wheel.
3. Visually inspect the power steering hoses for leaks or damage.
4. Check tire pressure.
5. Have a qualified mechanic inspect the steering system if the problem persists. They have the tools and experience to diagnose and repair more complex issues such as rack and pinion problems or pump failure. Ignoring the issue could lead to more costly damage.
Don't attempt to diagnose or repair complex steering system components yourself unless you have experience working on vehicles. Power steering fluid under pressure is dangerous, and improper repairs can lead to further damage or injury.
