* Power Steering Pump: The most likely culprit is a failing power steering pump. As the pump ages, its internal components can wear down, causing a whining noise, especially under increased demand (like turning and accelerating). The whine intensifies with increased steering effort and engine speed because the pump is working harder.
* Power Steering Fluid: Low power steering fluid level can also cause whining. The pump might be struggling to draw enough fluid, leading to noise and potentially damage to the pump itself. Check your fluid level immediately; it should be within the marked range on the reservoir. If it's low, topping it off *might* temporarily alleviate the noise, but you'll still need to address the underlying leak.
* Power Steering Belt: A worn or loose power steering belt can also create a whining sound, especially under load. Inspect the belt for cracks, fraying, or excessive looseness.
* Power Steering Rack and Pinion: While less common, a failing power steering rack and pinion can also generate whining noises. This is usually accompanied by other symptoms like difficulty steering, leaks, or unusual play in the steering wheel.
What to do:
1. Check your power steering fluid level: This is the easiest and quickest thing to do. Add fluid if it's low, but only to the recommended level. A low level indicates a leak somewhere in the system, which needs to be addressed.
2. Inspect the power steering belt: Look for cracks, wear, or slippage. If it looks worn, replace it.
3. Listen carefully: Try to pinpoint where the noise is coming from. Is it definitely from the power steering area under the hood?
4. Take it to a mechanic: If the problem persists after checking the fluid and belt, you should have a professional mechanic diagnose the issue. They can properly assess the power steering pump, rack and pinion, and other related components to determine the exact cause of the whine and recommend the necessary repairs. Ignoring the problem could lead to complete power steering failure.
Don't continue driving with a persistent whining noise from your power steering. It's a sign of a problem that could worsen and leave you stranded.
