power steering assist fault

Power Steering Assist Fault: Meaning and how to fix it

You need to know how to solve a power steering assist fault if you see a dashboard warning light or experience difficulty steering your car. You shouldn’t be driving while having these issues. You shouldn’t be driving while having these issues.

Driving has gotten simpler and safer ever since power steering technology was introduced to automobiles. It gives the vehicle more control and more maneuverability.

Both a hydraulic power steering system and a power steering assist system that serves as an addition are included in the power steering system. When it malfunctions, a power steering assist fault alert will appear. Thus in this article we’ll be discussing about Power Steering Assist Fault there  Meaning and how to fix it.

power steering assist fault

So, let’s dive in!


What does the Power Steering Assist Fault mean?

The power steering system has progressed since it was first introduced. Electric power-assisted steering devices are available nowadays. It still includes a hydraulic pump to move fluid, but unlike earlier models, it no longer absorbs engine energy. Instead, the fluid is pressurized using an electric pump, which makes steering simpler.

There is hydraulic fluid in the reservoir. The fluid transfers and generates a force that acts to turn the wheels when you turn the steering wheel. Older systems extract energy from the engine through a belt connection. Instead, modern vehicles—especially hybrid ones—have an electric pump that is powered by the battery.

Power steering is essential since it powers several modern-day safety systems. The EPAS system could be involved in operation if your car has advanced technologies like lane assist, parallel parking assist, or others.

How Does It Work?

The system operates in a manner similar to other hydraulic systems. However, how does it create pressure, and how precise is it? A number of small and large components work together to preserve precision. When the steering is pushed in a particular direction, the fluid that is stored in the reservoir is pumped. The force applied to the steering wheel is multiplied and transferred by the hydraulic fluid until it reaches the wheels of the vehicle.

Previously, the engine provided power to the pump. It had a belt connection to the engine and used the engine’s power to drive the pump. Today, the energy needed for the pump is produced by an electric pump. A lot of energy was known to be consumed by the additional belt that was attached to the engine. The belt will be fastened even if you are not steering. As a result, the system as a whole is ineffective. This problem is fixed by using an electric pump.

When necessary, the electric pump draws power from the battery, increasing the effectiveness of the entire system. In essence, a power-assisted steering system is your power steering. In the past, we had a system that was entirely driven by hydraulic fluid and engine power. A hybrid system that uses an electric pump is more typical today.

The EPAS is another feature of power steering. It is independent of any hydraulic system. This is a rising technical characteristic right now. Many new automotive features, including lane assist, parallel parking assistance, and cornering features, were created using the new EPAS steering system.

Causes of Power Steering Assist Fault

Faulty steering angle sensor

The power steering assist needs to know how much or whether your steering wheel is straight in order to work properly. The vehicle employs a steering angle sensor that is located behind your steering wheel to determine this.

The error warning for power steering assist will occur if this sensor malfunctions and displays the incorrect angle. When this sensor is defective, you can also encounter other issues with traction control or other crucial components.

Fluid Leaks

Power steering assist failure is also caused by power steering fluid leaks. There is more to leaking power steering fluid than just an oil puddle in your driveway. You should be more concerned with other things than the mess the leak caused. Leaks in the power steering fluid could drastically alter the system’s performance in a matter of minutes. Driving may cause this to occur. Mid-drive, you can experience low fluid levels.

When you lose power-assisted steering while driving, it will take some getting accustomed to it because you are used to it. Your driving becomes a safety danger for you and everyone else on the road when you are unable to steer your automobile with complete control.

Typically, steering fluid is red or pink in color. The hue of this is the same as transmission fluid. You can examine the leak’s location to determine whether it is a steering fluid leak. A puddle will form beneath your engine if your steering fluid leaks.

Low Fluid

Fluid is required for both the hydraulic and electrical power steering systems to function properly. You can start having problems if the steering fluid isn’t fully topped off. Usually, you’ll have to use more effort to turn your car when the fluid level is low.

To prevent future problems, it’s critical to understand why the fluid level is low. Prior to adding more fluid to the system, any leaks must be fixed. Otherwise, the same thing will occur, and you might even completely lose power steering. Additionally, you should routinely replace the power steering fluid. The frequency of this should be determined by consulting the owner’s manual.

Electrical Problems

This has nothing to do with the system’s hydraulics. The electrical system could be at fault whenever you experience a circumstance where turning the wheel is substantially more difficult than usual. The same thing happens when your hydraulic fluid levels are low, but if your fluid levels are fine and you still have this problem, your electrical system may be to blame.

Pressurized fluid is not used for turns when the electrical aid system fails, which is often the electrical pump. Since you aren’t receiving any turn assistance, the steering becomes tighter as a result. Utilizing an OBD 2 scanner is the most straightforward technique to identify the problem. You should be able to pinpoint the problematic component in this method.

If you don’t have one of these tools, you’ll need to check about a probable issue. Examine the wiring leading up to the steering system and the fuse box. If you can discover anything strange, that might be the reason. Verify the battery’s voltage before moving on.

Blown fuse

A blown fuse for the power steering pump or another power steering system may occasionally be the cause of the issue. A fuse should typically not blow if there is no problem, but it could just be the result of an unexpected voltage spike. To identify where the fuses for your car’s power steering system are located, see your owner’s manual.

Faulty Power Steering Pump

Despite operating differently, both the conventional and electrical power steering systems contain pumps. The fluid cannot go through the system if the pump starts to malfunction.

The pump is the component that has the least chance of failing in both scenarios, but it is not impossible. It could be time to analyze the pump if all other potential issues have been ruled out by your troubleshooting.

How to fit it

Fluid should be added

It’s crucial to regularly check the power steering fluid and to top it off as needed. Although there shouldn’t be any fluid loss, it’s always a good idea to check. If you see a sudden decline in fluid, you should fill it back up and investigate the issue. Any leaks should be fixed right away.

Additionally, the majority of automakers advise changing the power steering fluid every 50,000 miles or four years, whichever comes first. Failure to replace the fluid can result in contamination, which reduces its ability to perform its function.

Replace The Steering angle sensor

You might need to replace the steering angle sensor if the wheel alignment appears to be correct but the error messages continue to indicate that the sensor is malfunctioning. The steering wheel must typically be removed in order to access it in most car models. Unfortunately, you may also need to configure the new steering angle sensor in some automobile models, which is frequently something that can only be done by the dealer.

Repair Electrical Problems

An electrical problem isn’t always easy to fix. To find the issue, you’ll need to examine a lot of wires and connectors. Since it’s probable that the fuse has blown, we advise starting there.

If that isn’t the issue, it’s time to turn your attention to the system’s entire electrical infrastructure. It’s time to replace any connectors or wiring that has frayed or other damage.

Replace The Power Steering Pump

The majority of people would rather avoid dealing with it, however, power steering pumps can also break down. You must install a new pump if your diagnostic assessment points to one. To determine the procedures for your car, read the service handbook. If not, bring it to a nearby auto repair shop for extra help.

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Watch the video below to learn more


Can you still drive with power steering assist fault?

Only operate vehicles equipped with a power steering pump when the power steering is engaged. You shouldn’t drive the car if the power steering stops working until the pump is changed.

What to do if power assist in your steering fails?

The most important thing is not to panic. To alert other drivers that you are experiencing a problem, honk your horn and flash your headlights. Then, slowly move your car to the shoulder of the road.

How can I reset my power steering?

When the warning light illuminates, a top off is not necessary because electrical power steering systems don’t require any fluid. A straightforward reboot is required because, in the majority of cases, a minor technical issue with the computer system may be to blame. All you have to do to get the light to reset is to turn off and restart your engine.

What are the main causes of power steering failure?

  • Contaminated Fluid.
  • Improper Fluid Levels.
  • Broken Belts.
  • Damaged Steering Pump.
  • Too Much Force.
  • Power Steering Maintenance.
  • About Christian Brothers Automotive.

How do I know if my power steering is faulty?

Your power steering pump is likely to be at fault if your steering wheel responds slowly when you’re turning a bend.

What does power steering fault mean?

The light alerts you to a failing power steering system and urges you to look into the issue. Depending on the type of power steering system in your car, the cause can be different. The most frequent cause of this issue with hydraulic power steering systems is a leak in the system that results in a low fluid level.

How do you turn off steering assist on a Toyota?

To access the settings menu on your dashboard, use the steering-wheel-mounted meter control switches. To activate or deactivate the steering aid, highlight Steering aid and then press OK on the meter control switch.

What is the most common failure in a power steering system?

The wheel becomes more and more difficult to turn until it completely fails if the fluid is not replaced in a timely manner. The main causes of power steering leaks are worn-out, deteriorated seals and damaged hoses. The pump may overheat or experience rapid wear if there is not enough fluid.

What is the first action to take when your power steering fails?

Reduce your speed as soon as you see that the steering is broken so that you can still have some control over the car. Additionally, this complements the hazard light. If your vehicle has cruise control, turn it off or use the brake to deactivate it right away.

Is there a fuse for power steering assist?

The electrical mechanisms that keep the power steering going quit working when there is an electronic malfunction. You may quickly examine the fuse box to determine if one of the fuses needs to be replaced because this kind of failure might be brought on by a fuse problem.

What are the common faults in the steering system?

  • Low power steering fluid.
  • Power steering fluid leak.
  • Belt that’s loose, worn or slipped.
  • Cracked or peeling hose.
  • Slipped hose coupling.

That’s all for this article where we discussed the Power Steering Assist Fault, It’s Meaning and how to fix it. Hope it was helpful. If so kindly share. Thanks for reading.


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