Symptoms
- Steering wheel takes more effort to turn than usual
- Worse at parking lot speeds
- Whining noise when turning while it's stiff
- Started gradually or suddenly
Likely causes
- CommonLow power steering fluidA low fluid level reduces the hydraulic assist, making steering heavier.
- CommonWorn or slipping serpentine beltOn hydraulic systems, the belt drives the power steering pump; a slipping belt reduces assist.
- PossibleFailing power steering pumpA worn pump loses pressure and assist over time.
- PossibleElectric power steering faultOn EPS-equipped cars, a system fault can reduce or remove assist, often with a warning light.
What to do
- Check power steering fluid level if your car has a hydraulic system (check the owner's manual, since many newer cars are electric and have no fluid).
- Look at the serpentine belt for cracking, glazing, or looseness.
- Listen for a whining or groaning noise when turning, which points to the pump or fluid.
- Check the dashboard for an EPS or steering warning light if your car has electric power steering.
- Top off fluid if low and recheck; a persistent low level suggests a leak that needs finding.
- Have a mechanic inspect the belt, pump, or EPS system if fluid and belt look fine.
Tools and parts
- Power steering fluid (if applicable)
Power steering fluidSearch: “power steering fluid for [your car model]”
Serpentine beltSearch: “serpentine belt for [your car model]”
When to call a pro
If topping off fluid doesn't help or your car has electric power steering with a warning light, have a shop scan for stored fault codes.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.