Steering Assist Fault Service Required: Causes and Fixes

Introduction to the topic

We often take power steering for granted because it is a contemporary marvel. There are still flaws in this highly complex system, and they become more apparent as it ages. You want to know how to remedy a power steering assist fault if you see a dashboard warning light or if you’re having trouble controlling your vehicle.

This manual explains the power steering assist technology and investigates possible causes of the issue. We not only help you diagnose the problem, but we also walk you through the repair process. Our tutorial concludes with an estimate of how much it will cost to fix the system, taking into account all of the issues that need to be fixed.

What is a power steering assist?

The term “power steering assist” refers to the mechanical aid used to improve steering.

It used to be that there was only one way to control the direction of your automobile. Two hands on the wheel, full throttle.

Power steering was first used commercially in 1951. The steering mechanism utilized a hydraulic power assist. There was a 1951 Chrysler Imperial involved. For the following half-century, this technology would be indispensable.

The EPAS system is available now. This indicates that the steering is aided by an electric motor. It still requires hydraulic fluid and operates via a hydraulic pump. In contrast to conventional hydraulic power steering systems, this one uses an electric pump to pressurize the fluid to aid in the steering.

Power steering assist fault message—what does it mean?

If you see the warning “Power Steering Assist Fault,” either the electronic or mechanical components of your power steering system are malfunctioning. Power steering fluid or electrical troubleshooting could be the solution, but there could be a more significant underlying problem.

Most modern vehicles have electronic power steering;therefore, this signal typically indicates trouble with that device or its sensors. Let’s investigate the mechanism more closely.

When a power steering system fails, why does it?

The parts of a power-assisted steering system vary from vehicle to vehicle. So, not all power-assisted steering systems will experience the same issues that we talk about here.

A car’s movement can only be managed by the driver through the use of steering. The vehicle’s engine and brakes work together to move it forward and to a stop, respectively. However, the steering is responsible for maintaining vehicle control. As a result, it needs to be cared for carefully and regularly maintained.

Many people experience the following issues with their assisted power steering systems.

1. Issues with the electricity

There’s nothing here to do with how the hydraulics work. A problem with the vehicle’s electrical system is a likely culprit whenever you experience very difficult wheel rotation. The same thing happens when your hydraulic fluid level is low, however, if that’s not the case and you still have this issue, it could be related to your electrical system.

Turns do not use pressurized fluid when the electrical assist system fails, typically the electrical pump. Since you are no longer receiving any help with your turns, the steering becomes more rigid.

Using an OBD 2 scanner is the simplest technique to identify the source of the problem. If you do it this way, you should be able to pinpoint the faulty part.

The absence of such a tool necessitates a more systematic investigation of the area under question. Verify all fuses are in working order and that the steering system’s wires are secure. Look for anything out of the ordinary that might explain the problem. In that case, check the battery voltage.

2. Short on fluids

When in use, hydraulic fluid is essential to the operation of a hydraulic power steering system or a fluid-electric hybrid power steering system. Your steering system could fail if you don’t regularly add fluid.

If you have to put in five times as much effort to move the steering wheel, your hydraulic system is probably low on fluids and can’t transfer the energy to the wheels as it should.

There’s no time to waste if you think your gas tank might be becoming low. Having to open the gasoline door of a cold automobile isn’t ideal. To do this, you must first start the engine and let it heat up before you can check the fluid levels. You can’t tell how much fluid is in your automobile unless you do this.

Driving with insufficient fluids is difficult and dangerous for the power steering system. In your mind, you can just grit your teeth and go through this drive, and then worry about the fluid levels when you get there. You could probably make it work, but if you’re not careful you could end up damaging the entire steering system.

3. Tough to turn

When you turn the wheel, you may notice a grinding sound. Most of the time, this only needs a minor adjustment, so don’t worry too much about it. But there were instances when the noises were so loud that they were downright terrifying.

The belt drive is usually the cause of the problem. Verify the pulley on the power steering pump. Thus, if you hear grinding noises, you should check that first. Even if the grinding sounds aren’t immediately dangerous, they’re a warning that trouble is on the horizon.

Fixing it isn’t a big deal. Raise the vehicle on blocks, and have a helper drive it around per your instructions. As he turns the wheel, you can crawl under and check the belt. You should tighten it and make the necessary adjustments if it looks to be slipping.

4. Dripping fluids

Loss of power steering fluid pressure can also cause the power steering assist to fail. It’s more than just a puddle of oil if your power steering fluid leaks. The mess the leak caused is not the most pressing issue at hand.

Leaks in the power steering fluid could drastically alter the performance of the system in a short amount of time. While driving, this might occur. You could run the risk of having low fluid levels in the middle of your drive.

It will take some time for you to become acclimated to manual steering after being accustomed to power steering. If you lose complete control of your vehicle while driving, you endanger yourself and others on the road.

The steering fluid’s typical color is bright red or pink. Transmission fluid is the same hue as this. The location of a leak in the steering fluid can help identify the problem. Any leak in your steering system will leave a pool of fluid under your motor.

Transmission fluid leaks, on the other hand, tend to occur in the center of the vehicle.

How to correct a malfunctioning power steering system?

Steering assist fault service required

1. Fluids

Keep an eye on the power steering fluid level and replenish it as needed. Even though there shouldn’t be any fluid loss in the system, it’s best to check just in case. If you see a drop in fluid, it’s important to replenish it and investigate the cause. As soon as a leak is discovered, it must be repaired.

When it comes to power steering fluid, most manufacturers advise replenishing it every four years or 50,000 miles. The fluid’s effectiveness decreases if it isn’t changed regularly to prevent contamination.

2. Examine error messages

Always check the error codes with an OBD2 scanner before beginning electrical troubleshooting. Insights like this can save you a lot of cash by allowing you to make more informed decisions.

If your dashboard displays a message about a problem with the power steering assist, a fault code is saved that describes the cause of the warning. You may either take your car to a repair shop and have them use an OBD2 scanner to read the error codes for you, or you can buy your scanner and do it yourself. However, make sure to purchase a scanner that is compatible with your vehicle’s power steering assist system.

3. Have your wheels aligned

Check the wheel alignment before addressing the steering angle sensor if you read the error codes and discover there is an issue with the sensor. The results from the sensor’s steering angle readout can be inspected with the use of the vehicle’s owner’s OBD2 scanner.

It may be time for a wheel alignment if it seems to be giving you accurate readings but you still notice that your steering wheel is not straight at higher speeds.

4. Remove and replace the steering angle sensor

Even if the wheels are properly aligned, the steering angle sensor may need to be replaced if error messages indicate there, is a problem. Most vehicles’ steering wheels have to be taken off before the steering angle sensor can be replaced.

Unfortunately, some models require the assistance of a dealer to get the new steering angle sensor programmed.

5. Fixing an electrical problem

Finding the source of an electrical problem isn’t always easy. If you’re looking for the source of the issue, there are several wires and ports to check. To rule out the possibility of a blown fuse, you should check that first.

If that isn’t the issue, then you should check the system’s wiring and components. Connectors and wires should be replaced if they are worn or broken.

6. The belt needs to be replaced

The problem could be the belt driving the system, which would necessitate buying a new one. This is rather simple to achieve in some representations.

However, many designs make it tedious to switch out the belt. It’s best to get in touch with an expert before further damage is done if you are unsure of what you’re doing.

7. Get a new power steering pump

It’s not something most people look forward to doing, but the power steering pump can stop working. If the pump is identified as the source of the problem after doing diagnostic testing, a replacement pump will have to be installed.

If you want to know what needs to be done for your specific car, read the manual. If that doesn’t work, then you should probably take it to a garage for some professional help.

Watch steering assist fault service required ford ranger | Video

People also ask questions and answers related to Steering assist fault service required

What will the cost be to repair the issue with the power steering assist?

There is no set price to repair the power steering assist issue, however, it might cost anything from $0 to $1,000. Fixing it might be as cheap as $10, if you’re lucky, and involve changing a fuse or adding power steering fluid. A malfunctioning power steering pump could be the root of the problem, resulting in a bill of $1,000 or more.

Is it possible to drive with faulty power steering?

You can still drive if your power steering stops working, but you shouldn’t. Difficulty controlling the vehicle increases, and in the worst cases, an inability to respond quickly enough might lead to an accident.

When Should You Change Your Power Steering Fluid?

Every four years or 50,000 miles, whichever comes first, you should change your power steering fluid. Whenever one occurs first. Inspecting the power and seeing fluid for contamination or a brownish hue should prompt immediate replacement; do not wait the recommended four years.

What does it mean by “steering assist problem service required”?

Maintenance for Adaptive Steering Defects is Necessary. This vehicle’s adaptive cruise control has been disabled. When traveling in a straight line, the steering wheel may not be in a perfectly horizontal position. See an authorized dealer if this error message persists.

Could you please tell me how to reset the power steering service?

As there is no need to add fluid to an electrical power steering system, this warning signal does not cause concern. Most of the time, restarting the computer is all that’s needed to fix whatever issue has arisen. To get the light to go out again, simply shut down the engine and start it up again.


The presence of power steering greatly increases travel security. The only part of the vehicle that can be maneuvered is the steering wheel. The car may be sped up or slowed down with the help of the engine and the brakes but staying on the road requires more than just those two things.

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