* Speed-dependent whine: The whine will increase in pitch and intensity as the engine speed increases. If it stays constant regardless of engine RPM, it's likely not the power steering pump.
* Steering-dependent whine: The whine will often get louder when you turn the steering wheel, especially when turning at low speeds or when the steering is under significant load (like maneuvering in tight spaces). If it's only present when steering, it strongly suggests the power steering pump or related components.
* Location of the noise: The noise will generally seem to originate from the area of the power steering pump, which is usually located near the engine's front and often close to the serpentine belt.
* Fluid level: Check your power steering fluid level. Low fluid can cause the pump to whine due to insufficient lubrication.
* Fluid condition: Inspect the power steering fluid. If it's dark, burnt, or smells burnt, this indicates the fluid is likely degraded and may be contributing to the noise. This needs addressing regardless of whether it's the primary cause of the whine.
* Whine only when engine is running: The noise should only be present when the engine is running. If you hear it when the engine's off, it's definitely not the power steering pump.
Important Note: While these are strong indicators, it's difficult to diagnose mechanical problems definitively without a proper inspection. If you suspect your power steering pump is the source of the whine, it's best to take your vehicle to a qualified mechanic for diagnosis and repair. Continuing to drive with a failing power steering pump can cause further damage.
