If you’re driving and notice that your steering feels heavier than usual or you’re greeted with a warning light indicating a “Power Steering Assist Fault,” you may feel concerned. Power steering assist is a crucial component of your vehicle, ensuring that your steering wheel turns effortlessly.
Without it, driving can become not only difficult but also unsafe. Fortunately, in many cases, you can reset the power steering assist fault yourself, provided the issue isn’t too severe.
As someone who has spent quite a bit of time researching and dealing with steering issues, I’m here to walk you through how to reset the power steering assist fault and explore the possible causes and solutions.
With proper guidance, you’ll have the confidence to troubleshoot this issue, and if needed, take the next steps toward restoring your car’s steering system to optimal condition.
Understanding the Power Steering Assist
Before we dive into resetting the power steering assist fault, let’s take a moment to understand what power steering assist is and how it works. Power steering assist is a system in your vehicle that makes steering easier by reducing the amount of effort needed to turn the wheel. There are two main types of power steering systems:
- Hydraulic Power Steering (HPS): This system uses hydraulic fluid to power a pump that assists in turning the steering wheel.
- Electric Power Steering (EPS): Instead of hydraulic fluid, this system uses an electric motor to assist with steering. It’s more common in newer vehicles and generally more energy-efficient than hydraulic systems.
The term “power steering assist fault” typically refers to issues with the electric motor in electric power steering systems. If this fault occurs, it can result in your steering becoming more difficult, as the power steering assist is no longer functioning properly. In some cases, it may feel like you’re driving a vehicle without power steering at all.
What Causes a Power Steering Assist Fault?
There are several reasons why you might encounter a power steering assist fault. While some can be simple fixes, others may require more complex solutions. Here are the common causes:
Low or Contaminated Power Steering Fluid (For Hydraulic Systems)
If your vehicle uses hydraulic power steering, low or contaminated fluid can trigger an assist fault. Inadequate fluid levels or dirty fluid can cause the power steering pump to malfunction, leading to a lack of assistance when turning the steering wheel.
Electric Power Steering Motor Issues (For EPS Systems)
In electric power steering systems, a malfunctioning electric motor or a faulty connection can cause the steering assist to fail. The motor might not be getting enough power, or there could be issues with the wiring or sensors.
Faulty Steering Rack or Sensor Issues
The steering rack and its sensors are crucial for sending signals to the power steering system. If the rack is damaged or the sensors fail, the power steering assist may not work as it should. In electric power steering systems, these issues are more common.
Blown Fuse or Faulty Relay
In some cases, a blown fuse or faulty relay can cause the power steering system to stop functioning. The electrical components responsible for powering the system might not be getting the necessary current, leading to a failure.
Software or Calibration Issues
Modern vehicles with EPS systems often rely on software to control the power steering motor. A software glitch, incorrect calibration, or failure to communicate with other vehicle systems can trigger an assist fault.
Battery or Charging System Issues
A weak or failing battery can cause a power steering assist fault, especially in electric power steering systems that rely on the battery to function. If your car’s battery is weak or the alternator isn’t charging properly, the power steering motor may not receive enough power to operate.
Worn or Damaged Components
Worn steering components, such as the steering column, pump, or belt (for hydraulic systems), can also cause issues with power steering assist. Over time, parts wear out and may fail to deliver the necessary assistance for smooth steering.
How to Reset Power Steering Assist Fault
Now that we understand some common causes of a power steering assist fault, let’s walk through the steps on how to reset this issue. Depending on your car’s make and model, the procedure may vary slightly, but here are general steps you can follow.
Check the Power Steering Fluid (For Hydraulic Systems)
If your vehicle uses hydraulic power steering, the first thing you should do is check the fluid levels. Low fluid levels can often trigger a power steering assist fault. To check the fluid:
- Locate the Power Steering Reservoir: This is usually located near the engine, labeled clearly as “Power Steering” with a dipstick or cap.
- Check Fluid Levels: If the fluid is low, top it up with the recommended fluid (make sure to consult your vehicle’s manual).
- Inspect for Leaks: If the fluid levels are consistently low, there might be a leak in the system, which needs to be addressed.
After topping up the fluid, start the vehicle and check if the power steering assist fault has been resolved.
Reset the Power Steering Assist System via the Car’s Computer
In many modern cars with electric power steering, resetting the system might be as simple as resetting the car’s computer. Here’s how you can do that:
Turn the Ignition Off: Begin by turning off the vehicle’s ignition and waiting for a few minutes.
Disconnect the Battery: If the issue persists, disconnect the car’s battery to reset the onboard computer. Leave the battery disconnected for about 10-15 minutes.
Reconnect the Battery: After the waiting period, reconnect the battery and start the vehicle. The power steering assist fault may have been cleared.
Drive the Car: Test the steering to see if the issue has been resolved. If the fault is still there, further inspection might be necessary.
Check for Faulty Fuses or Relays
If there’s no improvement, it’s a good idea to check the fuses and relays related to the power steering system. A blown fuse or malfunctioning relay can cut power to the steering motor.
- Locate the Fuse Box: Check your vehicle’s manual to find the fuse box, which is typically located under the dashboard or in the engine compartment.
- Check for Blown Fuses: Look for any blown fuses related to power steering. Replace any fuses that seem damaged.
- Check Relays: If your vehicle has relays for power steering, inspect them for damage and replace them if necessary.
Perform a Calibration (For Electric Power Steering Systems)
For vehicles with electric power steering, resetting the fault may require performing a calibration of the power steering motor.
Some vehicles have a specific procedure for recalibrating the system, which can be done using an OBD-II scanner tool. If you have access to a scanner, you can follow the steps in your vehicle’s service manual to reset the system.
Seek Professional Help
If none of the above steps work or if you suspect a more serious issue, it’s time to seek professional help. A certified mechanic can diagnose the issue more thoroughly, checking the wiring, sensors, and other components of the power steering system. In some cases, the power steering motor, steering rack, or other parts may need to be replaced.
Prevention and Maintenance Tips
While it’s great to know how to reset the power steering assist fault, it’s even better to prevent the issue from occurring in the first place. Here are a few maintenance tips to keep your power steering system running smoothly:
Regularly Check Fluid Levels (For Hydraulic Systems)
Make it a habit to check your vehicle’s power steering fluid levels every few months, especially if you notice any changes in the steering feel.
Keep an Eye on the Battery
Since weak batteries can cause issues with electric power steering, make sure to regularly check your car’s battery and charging system.
Avoid Driving Over Rough Terrain
If your car’s steering components are exposed to excessive wear and tear (like driving over rough terrain or curbs), it can damage the system. Be mindful of how you drive.
Service the Power Steering System Regularly
Just like the rest of your car’s systems, the power steering system should be inspected and serviced at regular intervals to prevent issues from arising.
Conclusion
Resetting a power steering assist fault can often be a simple task, but there are times when the issue may be more complicated and require professional attention. If you’re experiencing difficulty turning your steering wheel or a “Power Steering Assist Fault” warning, don’t panic — in many cases, it’s a simple fix.
Always start by checking the power steering fluid, resetting the system through your vehicle’s computer, or inspecting the fuses and relays. If the problem persists, seeking professional help is the best course of action.
Regular maintenance, along with a little DIY knowledge, can help you avoid costly repairs down the road. Keep an eye on your power steering system, and you’ll be cruising safely for years to come.
FAQs
What does a power steering assist fault mean?
A power steering assist fault means that the steering system in your vehicle is no longer providing power assist, making it harder to steer, especially at low speeds.
Can a bad battery cause a power steering assist fault?
Yes, a weak or failing battery can affect electric power steering systems, as they rely on battery power to operate the steering motor.
How can I tell if my power steering system is hydraulic or electric?
You can check your vehicle’s manual or look under the hood. Electric systems often have an electric motor and don’t require power steering fluid, whereas hydraulic systems use fluid to power the steering pump.
What happens if I drive with a power steering assist fault?
Driving with a power steering assist fault can make your steering heavy and difficult to control, which may be dangerous, especially at low speeds or when parking.
Is it expensive to fix a power steering assist fault?
The cost to fix a power steering assist fault depends on the severity of the problem. Simple fixes like topping up fluid or replacing fuses are relatively inexpensive, but replacing the steering motor or rack can be costly.
Hi, I’m Melvin, an automobile engineer with extensive experience in automobile equipment. I currently work for a local automobile firm, where I specialize in the car parts industry. I’ve had the opportunity to collaborate with seasoned inspectors, gaining invaluable hands-on experience that goes beyond just theory.
My passion for automotive care started at a young age, which led me to create CarSpareCare. Through CarSpareCare, I share the knowledge and skills I’ve acquired over the years to help others navigate the world of car maintenance and repairs.
My goal is to provide practical tutorials, essential safety advice, and the latest industry insights so that anyone—whether a beginner or an expert—can confidently tackle their automotive projects.
