Why Does Electric Power Steering Become Heavier?

[GabrielRose]

The reasons for electric power steering becoming heavier include: 1. Excessive tightness between the rolling bearings and sliding bearings connected to the steering system: This can reduce the lubrication effect of the bearings, causing sticking, which then reflects in the steering wheel's performance. 2. The pump pressure of the power steering pump fails to meet the standard value: This results in a heavy feeling when using the steering wheel. Check the flow control valve; during driving, leaks in the flow control valve or safety valve can be repaired by grinding, and then check if the spring of the safety valve has failed. 3. Low hydraulic pressure in the power steering system: If the steering wheel becomes heavy due to low hydraulic pressure in the steering system, it is necessary to promptly visit a repair shop for maintenance. 4. Long-term lack of maintenance or untimely replacement of the return oil filter in the oil reservoir: This can lead to poor circulation of the power steering fluid, making the steering wheel feel heavy.

[SanMia]

Last week while driving, my steering wheel suddenly became heavy, like pushing a millstone. I asked a mechanic I know, and he said that electronic power steering becoming heavy is often due to insufficient battery power, because the steering system requires stable electricity to provide assistance. If the battery is aging or the alternator has issues, low voltage can weaken the power assist. Additionally, a faulty steering sensor or motor malfunction could also cause increased steering effort, requiring professional inspection. Low tire pressure can sometimes make steering feel heavy, but the main issue is usually the electronic components. I plan to first use a voltage tester to check the battery, ensuring it's above 12 volts. If the power is normal, then I should suspect sensor or motor issues, and avoid disassembling anything randomly to prevent further damage. If this happens on the road, slow down gradually and pull over safely. Regular maintenance should focus on battery lifespan and system condition to reduce such risks. Address the issue early to avoid losing control while driving and causing bigger problems.

[LaDominic]

The increased heaviness in electronic power steering can involve several factors. Power supply issues are the most common, such as insufficient battery voltage or alternator failure, which prevent the EPS from receiving adequate power to operate. Sensor errors within the control module may also lead to reduced power assistance, as these sensors are responsible for detecting the steering wheel's turning force. If the motor is worn or overheated, its output will decrease. During daily driving, poor road conditions or insufficient tire pressure can increase steering resistance, but the core issue lies in the electronic system. If a problem is detected, it is recommended to use an OBD diagnostic tool to read fault codes for quick issue identification. Check if the battery is aging and replace it if the voltage is low. For prevention, regularly maintain the battery and clean electrical connectors to prevent dust buildup. Do not ignore the issue, as it affects handling safety—especially during turns where excessive effort can lead to accidents. Ensure timely resolution.

[Galadriel]

When the electronic power steering suddenly becomes heavy, it must be taken seriously as it concerns safety. Difficulty in turning the steering wheel may lead to loss of control at high speeds or on curves. Possible reasons include a sudden voltage drop, such as a depleted battery or a faulty alternator causing the power assist to disappear. Low tire pressure or suspension damage should also be checked. If this occurs while driving, immediately slow down, turn on hazard lights, and stop in a safe location. Simple checks include seeing if dashboard lights are on or if the battery is low, and charging if necessary. However, internal issues like sensor or motor problems require professional repair to prevent dangerous driving accidents.