Why does the car make a humming sound when turning at low speed?
3 Answers
This situation occurs due to a malfunction in the power steering pump. The following is a detailed introduction to the car's power steering system: 1. Function: It uses the power generated by the motor to assist the driver in steering. The system directly provides steering assistance through an electric power machine, eliminating the need for a hydraulic power steering system's essential components such as the power steering oil pump, hoses, hydraulic oil, transmission belt, and pulley mounted on the engine, saving energy and protecting the environment. 2. Composition: The car's power steering system can improve stability when the vehicle shows unstable tendencies. The electronic power steering system can independently brake each wheel and participate in the engine system management to ensure driving safety. The car's power steering system mainly consists of a speed sensor, reduction mechanism, torque sensor, motor, and electronic control unit.
I've been driving for over twenty years and have seen plenty of cases of humming noises during low-speed turns. It's usually due to an issue with the power steering system. If your car has hydraulic power steering, a loose steering pump belt or insufficient hydraulic fluid can easily cause that humming sound during low-speed turns because the steering load increases. Uneven tire wear or incorrect tire pressure can also create friction noises, and loose chassis bolts are another common cause. Whenever I hear this sound, I always advise car owners not to delay—check the power steering fluid level and try topping it up or replacing the fluid. In the long run, regular maintenance of the steering system can prevent many problems, saving you from costly repairs to the steering column later. Safe driving comes first—don’t let that humming sound become a hidden danger.
As a young car owner who has only been driving for a few years, I was quite worried when I encountered a humming sound during low-speed turns last time. After asking some friends, I learned that it might be an issue with the power steering pump, especially since system pressure fluctuates more at low speeds. A loose differential or driveshaft can also cause similar sounds, though less frequently. The noise during daily driving turns can be distracting, but it's not hard to address. First, check if the power steering fluid is sufficient and whether its color has turned black or deteriorated. Wheel alignment issues should also not be overlooked. If the humming persists, consult a knowledgeable friend or visit a repair shop—don’t waste time guessing like I did. Developing a habit of checking your car’s condition is really important.
