Why is the steering wheel of the subject 2 test car very heavy and hard to turn?

[RosalieAnn]

The reasons for the steering wheel becoming heavy are insufficient power steering fluid and low tire pressure. The detailed causes and solutions are as follows: Insufficient power steering fluid: Generally, the feeling of steering weight is relatively constant. If it suddenly becomes very heavy one day, or gradually becomes heavier, it may be due to dirty power steering fluid. Similar to engine oil, it needs to be replaced. Alternatively, if there is a leak causing the fluid level to drop, the power assistance will decrease, making the steering wheel feel heavy. In this case, timely maintenance or adding/replacing the power steering fluid is required. Low tire pressure: Low tire pressure increases the contact area between the tires and the road surface, leading to increased friction and difficulty in steering, resulting in a heavy steering wheel, which is not conducive to driving safety. In this case, the tire pressure should be replenished promptly.