The heaviness of an electronic power steering wheel is mainly due to a lack of lubrication in the steering mechanism, low tire pressure, battery drainage, power assist failures, and insufficient wheel tire pressure. Furthermore, one should also consider and check for issues like blown fuses related to the electronic power assist, wiring problems, or short circuits to the ground. The root cause can be diagnosed based on the symptoms.
Reasons for a Heavy Steering Wheel:
1：If the rolling and sliding bearings in the various connecting systems of the steering mechanism fit too tightly, the lubrication effect of the bearings will decrease, leading to a jamming phenomenon, thereby manifesting in the steering wheel's response.
2：When the pressure from the power-assist pump doesn't reach the standard value, the steering wheel will feel heavy. It's essential to inspect the flow control valve. During driving, if the flow control valve or safety valve leaks, it can often be fixed through grinding. Afterwards, check whether the spring of the safety valve has failed.
3：If the steering system's hydraulic pressure is too low, it can also cause the steering wheel to feel heavy. If the heaviness is due to this low hydraulic pressure in the steering mechanism, it's crucial to seek repair at a service center promptly.
4：If air gets mixed into the car's steering system, it not only makes the steering heavy but can also cause noises during the steering process. Such issues need immediate attention to prevent unnecessary damage or wear in the future.
5：If the return oil filter inside the oil reservoir isn't regularly maintained or replaced timely, it can easily get clogged. This will hinder the smooth circulation of the power steering fluid, making the steering wheel feel heavy.
It's worth noting that the heaviness in the steering wheel might manifest as heaviness in one direction or both simultaneously. It's essential to promptly inspect the mechanical parts, reasons in the power-assist system, and check for any damaged seals, leaks, or air inclusions. Addressing the issue as soon as possible can prevent potential accidents.
