What Causes the Steering Wheel Light to Illuminate Yellow?
2 Answers
Steering wheel illuminating yellow is due to steering system sensor failure, steering gear failure, power steering pump failure, etc. The following is a detailed introduction to the automobile power steering system: 1. Function: It uses the power generated by the motor to assist the driver in power steering. The system directly provides steering assistance through the electric power machine, eliminating the need for a power steering oil pump, hoses, hydraulic oil, transmission belt, and pulley mounted on the engine in hydraulic power steering systems, saving energy and protecting the environment. 2. Composition: The automobile power steering system can improve vehicle stability. When the vehicle shows an unstable trend, the electronic power steering system can independently brake each wheel and participate in the management of the engine system to ensure driving safety. The automobile power steering system mainly consists of a speed sensor, reduction mechanism, torque sensor, motor, and electronic control unit.
Last time I was driving long-distance, the yellow light on the steering wheel suddenly came on, which really startled me. The steering wheel became extremely heavy, and I had to pull hard to turn, clearly indicating a problem with the power steering system. I pulled over at a service area to check, and the battery voltage showed low because the old battery was nearly depleted, causing the system to error upon startup. Later, at the repair shop, I replaced the battery, and the mechanic said the electric power steering pump is highly sensitive to voltage. If the light comes on, don't continue driving, as losing steering control on the highway is too dangerous. He advised fellow drivers to regularly check the battery's condition and preferably get a full maintenance check annually to prevent similar issues. I've learned my lesson and now replace the battery proactively—much more peace of mind. Never overlook these small problems.