Bad Battery Cause Electric Power Steering Problems

Can a Bad Battery Cause Electric Power Steering Problems?

Electric power steering (EPS) has grown more common in current automobiles owing to its efficiency and increased driving pleasure. However, like any other vehicle system, EPS depends on different components to work efficiently. One critical feature that sometimes gets ignored is the battery. In this article, we will investigate the influence of a poor battery on electric power steering systems, the symptoms that may occur, and the necessity of battery care to guarantee optimum EPS function.

Understanding Electric Power Steering (EPS):

Before going into the function of the battery, let’s take a quick explanation of electric power steering. In typical hydraulic power steering systems, a hydraulic pump driven by the engine gives help the driver’s steering input. On the other side, electric power steering systems employ an electric motor to help the steering effort. This motor gets signals from a control module depending on the driver’s input and vehicle speed, resulting in smooth steering motions. The components of an electric power steering system generally comprise an electric motor, control module, torque sensor, steering column, and other electrical connections.

The Role of the Battery in EPS:

The battery provides a key role in an electric power steering system. It delivers the requisite electrical power to run the EPS motor. When the driver turns the steering wheel, the torque sensor monitors the force exerted and communicates signals to the control module. The control module, in turn, examines this data and chooses the amount of aid required from the electric motor. To supply this aid, the motor requires a steady and reliable power source, which is where the battery comes into play.

Effects of a Bad Battery on EPS

A defective or weak battery may greatly impair the functioning of the electric power steering system. One of the key indicators of a failing battery is a lack of power assistance. Without an adequate power supply, the electric motor may not obtain the essential voltage to perform correctly. As a consequence, the steering effort needed by the driver rises, making steering more difficult and tiring.

In addition to the absence of power assist, a faulty battery might cause fault codes and warning lights on the vehicle’s dashboard. These symptoms act as a warning that something is awry with the EPS system. Ignoring these signs and continuing to drive with a bad battery might lead to more issues and significant safety hazards.

Battery Testing and Maintenance:

To avoid EPS issues caused by a faulty battery, frequent battery maintenance is necessary. Simple procedures such as monitoring the battery’s voltage and condition may help spot possible concerns early on. Battery voltage should be within the manufacturer’s stated range to guarantee effective EPS performance. If the voltage is low, the battery may require recharging or replacement.

It’s crucial to follow prescribed maintenance measures, such as cleaning the battery terminals and establishing a solid electrical connection. Over time, corrosion or weak connections might limit the battery’s performance, impacting the overall EPS functioning. Regular examination and cleaning may assist in preserving a good electrical connection.

Other Factors Affecting EPS:

While the battery plays a big part in EPS performance, it’s worth mentioning that other elements may also impact the system’s functioning. The state of the vehicle’s electrical system, especially the alternator, might impact the battery’s health. A malfunctioning alternator may not charge the battery effectively, resulting in an insufficient power supply for the EPS system.

Moreover, wiring and electrical connections throughout the car might impair EPS performance. Damaged or loose wiring may cause occasional power disruptions, resulting in EPS issues. Therefore, it’s necessary to evaluate the vehicle’s electrical system routinely and repair any difficulties swiftly.

Extreme weather conditions might potentially damage the battery’s performance and thus impact the EPS system. Extreme cold or hot conditions might increase the demand for the battery, possibly leading to a weaker state. Taking measures such as parking the car in a covered place or using a battery-insulating blanket in severe temperatures will assist in preserving the battery’s functionality.

Professional Diagnosis and Repair:

If you feel that your EPS difficulties are caused by a defective battery, it’s essential to get expert help. Automotive experts have the skills and diagnostic instruments to precisely determine the core cause of the problem. They may do battery testing, analyze the whole electrical system, and decide whether the car battery requires replacement or if other underlying causes are leading to EPS difficulties.

If a battery change is necessary, it’s vital to recalibrate the EPS system after installing a new battery. This ensures that the system detects the battery’s voltage and acts properly. Professional technicians have the skills and equipment to execute this calibration properly, restoring the EPS functioning.


In conclusion, a faulty battery may certainly create electric power steering difficulties. The battery plays a critical role in delivering the required electrical power for the EPS system to work efficiently. A failed battery may lead to a lack of power assist, greater steering effort, and significant safety issues. Regular battery maintenance, including voltage checks and appropriate cleaning of terminals, is crucial to avoid EPS concerns.

Additionally, elements including the vehicle’s electrical system, alternator performance, wiring quality, and harsh weather conditions may also affect the EPS operation. Seeking expert help for diagnosis and repair is suggested to guarantee correct identification and resolution of battery and EPS-related issues. By realizing the necessity of a good battery and implementing preventive measures, drivers may enjoy the benefits of a smooth and simple steering experience afforded by electric power steering systems.