What Causes Heavy Electronic Power Steering in Cars?

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Reasons for heavy electronic power steering in cars: Insufficient power steering fluid: Normally, the steering effort feels relatively consistent. If it suddenly becomes very heavy or gradually increases in resistance, it may be due to dirty power steering fluid (similar to engine oil, it needs periodic replacement) or a fluid leak, which causes the steering wheel to feel heavier. In such cases, timely maintenance or adding/replacing the power steering fluid is necessary. Low tire pressure: Low tire pressure increases the contact area between the tires and the road surface, raising friction and making steering more difficult, resulting in a heavy steering wheel. This is unsafe for driving and requires immediate tire pressure adjustment. Overly tight bearing fit: The steering system relies on rolling and sliding bearings. If these bearings are too tightly fitted, lubrication may be inadequate, leading to stiffness and causing the steering wheel to feel heavy. In such cases, inspect the mechanical components and power steering system, or check for leaks or damaged intake seals. Power steering system issues: The steering wheel and power steering system are closely connected. If the steering wheel becomes heavy, it may indicate poor electrical contact or other internal problems within the power steering system. In such cases, visit a 4S shop for inspection and repair.