* Alternator: A failing alternator bearing can produce a high-pitched whine.
* Belt tensioner or idler pulley: Worn bearings in these components can also create whining sounds.
* Water pump: While less common to whine, a failing water pump bearing can make a high-pitched noise.
* Other accessory drive components: Various other components driven by the serpentine belt could be the culprit.
Why it's hard to diagnose from just the description:
The fact that the noise is present in park suggests it's related to something engine-driven (like the alternator, power steering pump, or other belt-driven components) rather than something directly related to the transmission. However, without more information – such as:
* The pitch of the whine: A high-pitched whine is more suggestive of bearings, while a lower-pitched whine might suggest other issues.
* The speed of the whine: Does it change with engine RPM? A direct relationship with RPM points towards belt-driven components.
* Other symptoms: Are there any leaks? Is the power steering feeling sluggish or stiff? Does the battery light illuminate?
It's impossible to say definitively what's causing the noise.
Recommendation:
Take your car to a qualified mechanic for diagnosis. They can pinpoint the source of the noise by listening to it, checking belt tension, inspecting the power steering fluid, and conducting other diagnostic tests. Ignoring a whining noise can lead to more serious and expensive repairs later.
