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What Causes the Steering Wheel to Suddenly Become Hard to Turn and Heavy?

1 Answers

SanViolet

07/29/25 8:59am

The reason why the steering wheel suddenly becomes hard to turn and heavy may be due to a failure in the power steering system. If this occurs, do not continue driving. It is recommended to arrange for a tow truck to transport the vehicle to a repair shop or 4S store for inspection and repair to prevent accidents. Below are the relevant details: 1. Classification of Power Steering: There are three types of power steering systems in cars: electric power steering (EPS), electro-hydraulic power steering (EHPS), and mechanical hydraulic power steering (MHPS). 2. Electro-Hydraulic Power Steering System: Both electro-hydraulic and mechanical hydraulic power steering systems have hydraulic mechanisms, and both utilize a power steering pump. In the electro-hydraulic system, the pump is driven by an electric motor, whereas in the mechanical hydraulic system, the pump is driven by the engine. 3. Electric Power Steering System: The electric power steering system does not have a hydraulic mechanism or a power steering pump. Instead, it relies directly on an electric motor to provide steering assistance. 4. Regular Replacement of Power Steering Fluid: Both electro-hydraulic and mechanical hydraulic power steering systems require the use of power steering fluid. The fluid in these systems needs to be replaced regularly. If left unchanged for a long time, it can cause the steering wheel to become heavy.

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