What Are The Possible Causes Of EPS Malfunction?

Modern cars often feature Electronic Power Steering (EPS) for easier maneuvering. An electric-powered steering system is much more advantageous than the Hydraulic Power Steering (HPS) system. But, sometimes EPS malfunction takes place because of some damage inside the steering wheel or arch. So what happens when this system malfunctions? Understanding the potential causes of EPS problems can help you identify the issue and get it fixed quickly. 

Let’s find out some reasons why the EPS breakdown takes place:

How Does Electric Power Steering Work?

Developed as an important turning point in the automotive industry, the EPS proved to be significantly superior in performance compared to the other two power steering systems. Currently, EPS is commonly equipped on most new car models on the market.

EPS – Electric Power Steering is a system that is responsible for creating auxiliary forces acting on the steering actuator (with an intelligent system that uses an electric motor to draw power from the vehicle’s electrical system and assist in steering control) to maintain or change the direction of vehicle movement. The EPS system makes steering easier, simpler, and smoother when steering, moving at low speeds, or turning 90 degrees. 

To do this, the system has used a torque sensor located on the steering shaft, from which the signal is sent about the steering angle to the ECU for calculation and processing. The system then sends the appropriate current to the electric motor, pushing the rack of the steering system. Thanks to that, it is easy to rotate the steering wheel shaft in the desired direction for the driver.

Compared with the models using hydraulic power steering, the EPS system has many outstanding advantages:

• The EPS system has a simple structure and is also lighter weight than the hydraulic power steering system. Therefore, installation and repair are also easier and faster.
• In particular, this system does not use the power of the engine when operating. Instead, they use an electric motor to push the steering rack when the car is steered. As a result, the system will help the vehicle save fuel effectively when operating.
• In addition, the electric power steering system also helps your car be smooth when the car is running at low speeds. This gives car owners a feeling of safety and stability when driving the car on every journey. The hydraulic power steering system is the opposite, but the speed of returning the steering wheel to the center is faster, making it easy to move the car straight.

What Is EPS Malfunction And Why Does It Occur?

When the steering wheel gets struck or disengages from the electric motor, an EPS malfunction occurs. It usually happens because of the rust and water inside the arch or the aging of the tightening rubbers. The Electric Power Steering works on an electric motor attached to the wheel axle to turn the car. But, the rubbers and motor get damaged after a certain period due to aging or by other means.

Let’s talk about the reasons that cause EPS malfunction

Speed vs. bumpy roads

Driving at a higher speed over rough roads is another way for to EPS malfunction. If one really wants to preserve the EPS system, then slowing down the car on rough roads would be the ultimate choice.

In addition, the tightened rubber rings also get loose with overspeed on the bumpy roads. One can easily notice the rusty steering arch if it starts making noises when turned. So, you must slow down the car while driving on rough roads to treat your car with great care.

Too much water – flooded roads

One must avoid going through the watery roads to stay away from EPS damage. This is because the electric motor of EPS is connected to the arch, and it comes into direct contact with the water. The water can damage the electric motor in no time, and you have to face the stuck EPS. The big catch about electric motors and arches is that it is non-repairable and one has to replace them with a new one.

So, now you might wonder how to fix electric power steering problems? Here is the answer. Most car companies install electric motors and related stuff inside the car cabin to avoid these dilemmas, which is a great approach. One can refer to maintenance tips from professionals for more information.

Aging of the EPS system

One must not forget to replace the aged parts of the EPS system from time to time for proper care of the vehicle. When the steering starts making unusual noises or the EPS car light starts blinking, it’s time to inspect the entire system properly. The suitable age of the EPS system is five years, and one must take care of it on time. This is quite helpful to protect the EPS system from malfunctioning.

Know more about the function of the EPS in the video:

How To Fix Electric Power Steering?

Fixing electric power steering (EPS) can be tricky and often requires specialized tools and knowledge. It’s usually best to leave it to a qualified mechanic. However, here are some basic checks you can do before calling for help:

1. Check the fuse

Start by checking the fuse box for a blown fuse related to the EPS system. Replacing a blown fuse might be a quick fix.

2. Inspect wiring and connections

Carefully examine the wiring harness connected to the EPS system. Look for any loose connections, damaged wires, or signs of corrosion.

3. Check the power steering fluid

Some EPS systems use fluid. Make sure the fluid level is correct and top it off if needed.

4. Restart your car

Sometimes, a simple restart can reset the EPS system.

5. Listen for unusual noises

Pay attention to any unusual noises coming from the steering system. Grinding or whining sounds could indicate a problem.

Remember, if you’re not comfortable working on your car, it’s best to seek professional help. Tampering with the EPS system can be dangerous.

The Final Words

All in all, these were some of the reasons that caused EPS malfunction. From simple reasons like bad road conditions or too much water to the aging of the system, a variety of factors can lead to EPS malfunctions. So, take care of these issues and stay away from any troubles that might occur later on while driving.