Why is my vehicle making a whining noise while turning? If the Power Steering Fluid on your vehicle is low, there will be a whining noise when you turn. Power steering fluid is a hydraulic fluid used in the steering system to create a link between the front wheels and the steering wheel. This decreases the amount of effort it takes to steer the vehicle. If the power steering fluid is low, it will be hard to turn. Power steering fluid should be changed every 5 years or 60,000 miles for maintenance. If the power steering fluid is low, there may be a leak in the system. Call today to schedule an appointment to have your power steering checked!