How To Fix The Ford Fusion Power Steering Assist Fault

Ford Fusion power steering assist faults have been a big issue for many owners of this vehicle, especially on models introduced in 2010. 

The main issue is that the steering suddenly becomes very heavy, increasing the risk of accidents. This often happens due to recurring electronic faults.

This guide will explain why the power steering stops working in Ford Fusion cars, what signs to look for, what tools you need, and how to fix it step by step.

What does “Power Steering Assist Fault” mean for a Ford Fusion?

It typically comes on to indicate an electric power-assisted steering system failure or power steering assist fault.

Electric sensors, control modules, and a power steering motor replaced hydraulics. Any failure in these components sends a signal that disables the steering assistance and triggers a warning.

Common Symptoms of Ford Fusion Power Steering Assist Failure

Knowing what to look for can help diagnose the problem quickly:

• Sudden loss of power steering assist
• Stiff or rigid steering wheel
• Warning message on the dashboard
• Intermittent power steering functionality
• Grinding or clicking noise while turning
• The vehicle requires more effort to steer

Primary Causes of Power Steering Assist Fault in Ford Fusion

Before starting the repairs, the first thing to do is to find the cause of the problem.

Here are some common causes:

1. Faulty Power Steering Control Module (PSCM)

The PSCM controls the steering assist and communicates with other vehicle systems. A software glitch or electrical failure in this module is a leading cause of faults.

2. Steering Rack or Motor Failure

Worn-out brushes, moisture intrusion, or internal electrical faults might cause the electric motor incorporated in the steering rack to fail.

3. Battery or Charging System Issues

Low voltage from a dying battery or faulty alternator can disrupt EPAS operation, triggering fault codes.

4. Blown Fuses or Damaged Wiring

Loose connections or burned fuses interrupt the signal between the control module and the steering motor.

5. Software Calibration Issues

Some models require Power Steering Control Module Reprogramming or calibration after maintenance or updates.

Step-by-Step Guide to Fix Power Steering Assist Fault in Ford Fusion

Below is a step-by-step guide on how to fix the power Steering assist fault in the Ford Fusion:

Step 1: Scan for Diagnostic Trouble Codes (DTCs)

Use an OBD-II scanner that supports Ford’s EPAS system. Look for codes like:

• U3000 – Control Module
• C102D – Steering Angle Sensor
• C1B00 – Electric Power Steering Motor

These will help identify whether the problem is in the motor, wiring, or module.

Step 2: Inspect Battery and Charging System

Low system voltage is a hidden culprit in many EPAS issues.

• Test battery voltage (should be above 12.4V with the engine off).
• Check alternator output (above 13.7V with the engine running).
• Replace a weak battery or faulty alternator.

Step 3: Reset the Power Steering Control Module

Sometimes, a simple reset clears the warning.

• Disconnect the negative battery terminal.
• Wait for 15 minutes.
• Reconnect the terminal and start the car.
• Check if the warning has cleared.

If the fault persists, more advanced repairs may be required.

Step 4: Check the Fuses and Relays

Locate the fuse box (usually found under the hood or dashboard).

• Check fuse F26 (15A) and F4 (10A) connected to the steering system.
• Replace any blown fuses.
• Inspect wiring harnesses for corrosion or damage.

Step 5: Reprogram or Replace the PSCM

This step may require dealership-level tools or professional mechanics.

• Use Ford IDS or Forscan software to reprogram the module.
• If reprogramming fails, replace the PSCM entirely.
• After installation, the steering angle sensor calibration is performed.

Step 6: Replace the Steering Rack and Motor Assembly

If diagnostics show the steering motor or rack has failed:

• Purchase a remanufactured or new EPAS rack.
• Lift the vehicle and safely remove the front wheels.
• Disconnect the tie rods, steering column shaft, and wiring harness.
• Unbolt and remove the rack from the subframe.
• Install the new rack and reverse the steps.
• Perform alignment and steering calibration post-installation.

Repair Costs Breakdown for Ford Fusion Power Steering Assist Fault

Ford Fusion Models Most Affected

While the power steering fault can occur in various trims and years, the following are more susceptible to this issue:

• 2010 Ford Fusion
• 2011 Ford Fusion
• 2012 Ford Fusion
• 2013 Ford Fusion
• Early models with high mileage or exposure to high moisture levels show increased failure rates.

Can You Drive Your Ford Fusion with a Power Steering Assist Fault?

As a mechanic, I would not encourage you to drive with a power steering assistance fault. It gets tough to steer, and a person can feel the car moving in one direction. With that, the wheel is more strenuous to move. Hence, it would not drive correctly or, in some cases, may even be dangerous.

The greater effort puts strain on steering, which could trigger fatigue faster and slow reaction time. I recommend getting an expert to check this problem as soon as possible. 

The sooner it is diagnosed and repaired, the better your car’s safety and long life will be. It will prevent further damage to the power steering system and allow your Fusion to operate smoothly and safely.

How to Replace the Power Steering Pump in a Ford Fusion

Replacing the power steering pump may seem difficult, but with the right tools and patience, it’s manageable. With patience and proper tools, you can do it at home. Here is a step-by-step guide for how to go about this replacement.

Step 1: Disconnect the Battery

It is best to shut down the vehicle and disconnect the negative battery cable before you start working. This will avoid any ongoing electrical problems or accidental short circuits by the time you start working. 

Step 2: Locate the Power Steering Pump

The power steering pump is mounted at the front of the engine and is driven by a serpentine belt.

Step 3: Remove the Serpentine Belt

Loosen the tensioner, thus relieving the serpentine belt’s tension. Working carefully, remove the belt from the pulleys until the power steering pump is accessible. If you do not know the belt routing, a picture will greatly help during reinstalling.

Step 4: Disconnect the Hoses

You will quickly see the hoses connecting to the pump. Place an old drain pan underneath to catch spilled fluids, then disconnect the hoses. Expect some leakage of power steering fluid when disconnected.

Step 5: Unbolt and Remove the Old Pump

After removing the mounting bolts, carefully take the old pump out of the engine bay.

Step 6: Install the New Pump

You want to mount the new power steering pump instead of the old one. Bolt it up and reconnect the hoses. Ensure everything is tight, as you do not want any leaking later.

Step 7: Reinstall the Serpentine Belt

Route the serpentine belt back into place using the diagram or photo you took earlier. Using the tensioner, reapply the tension to the belt.

Step 8: Reconnect the Battery and Refill the Fluid

Reconnect the negative battery cable. Refill the power steering with the fluid. Turn on the engine and repeatedly twist the steering wheel both ways. This action will help to release the air from the system. 

Step 9: Check for Leaks and Test the System

When the engine fires up, inspect the pump and hose for signs of leakage and any unusual sounds. If everything seems and sounds fine, you are good to go.

How to Prevent Steering Assist Faults in the Future

• Keep battery terminals clean and tight.
• Replace weak batteries before winter.
• Avoid deep water or car wash exposure that can flood electrical parts.
• Perform software updates through a certified dealership.
• Check the system annually during routine maintenance.

Related Article: How Much Does It Cost to Wrap a Car?

Conclusion

A Power Steering Assist Fault in a Ford Fusion shouldn’t be ignored. It can stem from minor voltage issues or escalate into expensive steering rack failures.

Accurate diagnostics, timely software updates, and proper battery care can prevent most problems. Always address EPAS warnings early to avoid further damage or unsafe driving conditions.

Frequently Asked Questions

1. How Long Does a Ford Fusion Last?

With proper care, a Ford Fusion can last over 150,000 miles. The owner would then need routine oil changes and check brakes and tires occasionally to help keep it from the clock. Regular maintenance and not waiting too long for attention to a problem are the big secrets to living a long life in Fusion. 

3. How Does the Power Steering Assist System Work in a Ford Fusion?

Ford Fusion has an electric power steering system built to assist while steering. In particular, low effort is required on the steering wheel at low speeds. If anything fails, either in the motor or control module or any other components, a driver would experience stiffness or complete loss of assistance, among other steering disorders. Get to a mechanic if you start feeling some issues in steering to avoid anything worse.

4. Is It Safe to Drive with a Power Steering Assist Fault?

It is dangerous to drive the vehicle when there is a condition of loss of power in the power steering assistance. The steering is laborious to drive due to internal attributes, particularly during low-speed, non-tactical movements. The chances of an accident increase as the machine cannot behave as the operator desires. In such a case, the best thing would be to seek a qualified mechanic to restore the conditions for safe riding.

5. What Is the Power Steering Assist Recall on the Ford Fusion?

Several 2013-2018 Fusion models were subjected to a recall owing to suspected power steering failures on account of some technical glitches. If you have one of those recalled vehicles, now would be the time to get the status of your car checked for recalls. If your vehicle is affected, the dealer will perform the repair at no cost.

6. Can You Still Drive with a Power Steering Assist Fault?

Theoretically, a power steering assist failure could allow driving the car, but it is not advised. The driver’s steering effort becomes stiff and difficult to control in confined areas or acute turns. This is not worth delaying; it poses a safety hazard to yourself and other road users.