What is the reason why the steering power suddenly doesn't work when the weather is cold? The steering wheel is heavy, so it will take a while to drive. What is the reason?

This happens on the model of hydraulic power-assisted system. The temperature is cold in winter, and the viscosity of hydraulic booster oil will be high at low temperature after aging. After the cold car is started, the booster oil has high viscosity and poor hydraulic effect, which will cause the situation you mentioned. With the increase of vehicle driving temperature, the booster oil will be gradually diluted and the pressure will be normal. The low temperature resistance of new pressurized oil is much better than that of old oil, and replacing pressurized oil can greatly improve this situation. I hope I can help you. Have a nice day.

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