Why does the steering wheel suddenly become lighter with no resistance feeling?
3 Answers
The sudden lightness and lack of resistance in the steering wheel are related to the power steering system. Currently, there are three types of power steering systems in vehicles: electric power steering, hydraulic power steering, and electro-hydraulic power steering. For vehicles equipped with hydraulic power steering, it is normal for the steering wheel to suddenly become lighter and lose its tactile feedback during acceleration. However, for vehicles with electric power steering or electro-hydraulic power steering, a sudden lightness and lack of tactile feedback in the steering wheel indicate a malfunction. The steering wheel is a wheel-shaped device used to control the direction of cars, ships, and airplanes. Its function is to convert the force applied by the driver on the edge of the steering wheel into torque, which is then transmitted to the steering shaft. It mainly consists of a frame, foam, and corresponding installation clips or screw holes for the driver's airbag (DAB).
A few days ago, I encountered a similar case while repairing a car. The steering wheel suddenly becoming lighter with no resistance is most likely due to a power steering system failure. For example, in a hydraulic power steering vehicle, wear of the power steering pump or fluid leakage can cause the pressure to drop, making the steering wheel feel light as if it's not connected to the wheels. This is very dangerous because it can easily lead to loss of control when turning. It could also be a short circuit in the electric power steering motor or a malfunction in the control module. I recommend the owner stop the car immediately and turn off the engine, then check if the power steering fluid reservoir level is normal. If the fluid level is low, top it up or look for leaks; for electric systems, try restarting the vehicle to see if it recovers. Don't forget safety first—don't force the car to drive to the repair shop; calling a tow truck is safer. Regular maintenance can prevent fluid issues and extend the system's lifespan.
After only six months of driving, I suddenly felt the steering wheel become as light as air, with no resistance at all. At first, I thought it was an illusion, but it became increasingly obvious. After checking, it might be an issue with the electronic power steering, such as a sensor malfunction or a short circuit. With little experience as a new driver, I was even more afraid of an accident—so I quickly pulled over, turned on the hazard lights, and called the repair shop for advice. Later, the mechanic said the module needed debugging or updating. Remember to stay calm, avoid accelerating or making sharp turns. Learning some basic knowledge helps, such as common failure points in electric power steering. Safety always comes first—don’t wait for an accident to regret it.
