Why does the steering wheel suddenly become heavy?

Possible causes of a sudden heavy steering wheel include:

1.The lack or deterioration of power steering fluid will lead to hydraulic oil leakage, insufficient hydraulic oil in the power steering system, and the power steering effect will become worse and worse.

2.The pump pressure of the power booster pump does not reach the standard value. You need to check the flow control valve or safety valve for leakage, and check whether the spring of the safety valve is invalid.

3.If the tire pressure is too low, the contact area between the tire and the road will increase, friction will increase, and steering will become more difficult.

4.If the return oil filter in the oil tank is not maintained or replaced for a long time, the steering wheel will become heavy. You only need to clean the oil filter.

5.The bearing is too tight, resulting in poor lubrication of the bearing and sticking, and the bearing needs to be replaced.

6.If there are problems such as poor circuit contact inside the booster system, you need to go to a 4S store or repair shop to find professional personnel to inspect and repair it.

7.Toe-in problem: the meaning of toe-in is quite complicated. Simply put, it makes the steering wheel automatically return to the center position to ensure that the car can drive stably and straight. So when there is a problem in this aspect, it will also cause the steering to sink.

8.Failure of the steering gear and power pump also affects the steering of the car. Any failure of these two important components will cause steering difficulties.

9.Tires are aging, and the tread of old tires is very hard, which causes the friction between the tires and the ground to increase, so the old tires need to be replaced.

10.The fuse of the electric power steering is burnt out, because the steering wheel can still control the steering of the wheels, but it has lost the electric power. You can directly replace it with a new fuse with the same amperage.

When using the vehicle on a daily basis, drivers should pay attention to checking various vehicle indicators, such as tire pressure, the state of the power steering oil, etc., and regularly perform vehicle maintenance to avoid the steering wheel suddenly becoming heavy. If you encounter a situation where the steering wheel suddenly becomes heavy, it is recommended to go to a professional repair shop for inspection and repair in time.