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What Causes the Power Steering System Warning Light to Illuminate?

2 Answers

MacJayden

07/29/25 7:12am

When the power steering system warning light illuminates, it may be due to a malfunction in the steering system sensor, steering gear, or power steering pump. Below is a detailed introduction to the automotive power steering system: 1. Function: It utilizes the power generated by an electric motor to assist the driver in steering. This system directly provides steering assistance through an electric power steering motor, eliminating the need for components such as the power steering oil pump, hoses, hydraulic fluid, drive belt, and engine-mounted pulley found in hydraulic power steering systems, thereby saving energy and protecting the environment. 2. Composition: The automotive power steering system can improve vehicle stability. When the vehicle shows signs of instability, the electronic power steering system can independently apply brakes to each wheel and coordinate with the engine management system to ensure driving safety. The automotive power steering system mainly consists of a vehicle speed sensor, reduction mechanism, torque sensor, electric motor, and electronic control unit.

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DiCarlos

08/12/25 10:32am

Oh my, the power steering light on my car suddenly came on the other day, which scared me so much that I immediately pulled over to check carefully. This could be due to the power steering fluid level being too low—the pump needs sufficient fluid to work properly. If the fluid is low or leaking, the system can't provide enough assistance, and the warning light will come on. Another possibility is a malfunction in the pump itself, such as aging internal seals leading to insufficient pressure, which is quite common in older cars. Another common issue is sensor failure—if the steering angle sensor or pressure sensor fails, the control computer won't receive the correct signal and will trigger the warning light. Also, don’t overlook belt problems. The power steering pump is usually driven by the engine belt, and if the belt is loose or broken, the system won’t function properly. The safest approach is not to force driving and head straight to a professional shop to check the fluid pressure and electrical circuits, as this can prevent steering lock-up accidents. Remember, checking the fluid level during regular maintenance can effectively prevent this issue—don’t wait until the light comes on to take action.

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