Disclaimer: Not affiliated with or endorsed by Ford Motor Company. For informational purposes only. Full Disclaimer
How to Fix Power Steering Assist Fault in Ford F150
Updated:
Are you receiving a "Steering Assist Fault - Service Required" notification on your F150? This article discusses the reasons behind it and outlines the steps you should take.
If you own an F150, a potential fault in the steering assist system might be the cause, affecting your ability to steer smoothly and manifesting as an unresponsive, jerky, or vibrating steering wheel behavior.
Possible Causes for Power Steering Assist Fault
Several factors could trigger this error in your Ford F150. In the latest F150 models, an electronic power steering assist system replaces the conventional hydraulic system, introducing more electrical components susceptible to failure. While many issues and their solutions are complex and costly, a few are relatively easier to pinpoint.
Poor Wheel Alignment
One potential cause of power steering failure is inadequate car alignment. To detect this issue, consider having your car's alignment checked at a repair shop, a practice advisable for regular maintenance.
Loose Connection to Power Steering
Another potential culprit is a loose connection in the power steering wiring. To troubleshoot and address this issue, open the hood of your F150, locate the power steering cable, unplug it, and then reconnect it.
This solution proved effective in the video referenced below. Various factors, such as animals chewing on wires or general wear and tear, can damage any wiring involved in the power steering system.
In the video, a mechanic highlights a potential issue with the F150, where the wire rubs against the skid plate. Such damages can contribute to the sensor system errors discussed in this article and may escalate into more significant problems.
Shop From Amazon
Bad Rack and Pinion
A prevalent resolution for the power steering assist fault is addressing a malfunctioning rack and pinion, which constitutes the entire gear system of the power steering.
While the repair can be costly, it might be essential in certain situations. A faulty steering gear, synonymous with a bad rack and pinion, comprises the fundamental components of the power steering system.
Faulty Power Steering Control Module Harness or Connection
The power steering control module serves as the component that delivers motor torque, linking the steering column to the gear. Unlike the previous reliance on hydraulic fluid, this module is now responsible for powering the steering system.
Faulty Steering Angle Sensor Module Harness or Connection
The steering wheel position sensor is crucial in assessing the power transmitted by the steering system. It tracks the steering input angle and communicates this data to the power steering system through electronic means.
A key element in this process is the position sensor, located on the steering shaft. Within the steering column resides the power steering control module, which decides the necessary degree of steering assistance based on the information provided by the column sensor.
Faulty Steering Column
In addition to a faulty sensor, if issues are detected, the entire steering column may be deemed defective. The column, along with the power steering control module, motor, and sensor, functions as a unified unit.
Consequently, when any component within this assembly is damaged or malfunctioning, the entire unit necessitates replacement.
Faulty Intermediate Steering Shaft
The intermediate steering shaft links the gearbox to the steering wheel. Over time, it can develop rust and become sticky.
Fortunately, this item is reasonably priced, costing less than $100, making it a more cost-effective option than rebuilding the complete rack and pinion, which generally costs roughly $1,200 in parts.
Faulty Steering Shaft Torque Sensor Harness or Connection
The steering shaft torque sensor is positioned on the steering pinion, a pivotal component in power steering. This sensor gauges the torque or turning power applied to the wheel, and then conveys this data to the electronic control unit, enabling the adjustment of motor power as needed.
How Do You Fix Steering Assist Fault on Ford F150?
Given the diverse range of potential causes contributing to this issue, it is essential to explore various approaches for resolution. Below are detailed methods to address the problem.
Rebooting Your F150 ECU
If suspicion arises regarding a computer-related problem, initiate a reboot by turning off your car's ignition for a brief duration and then restarting it.
Alternatively, disconnecting the battery for approximately five minutes serves as an effective method to reset the computer, eradicating any stored information from its memory.
Shop From Amazon
Resetting Your ABS System
To perform a reset on your ABS system, adhere to the following steps: turn the ignition key to the "on" position and wait for the check engine light to go off.
Start the engine and hold down the brake pedal as it restarts. This action facilitates the recalibration of sensors within your brake system, effectively addressing any issues that may have been present.
Executing these measures ensures a comprehensive approach to resolving the identified issues, promoting optimal functionality and stability in your vehicle's systems.
Replacing Your ABS Module
Ensuring the proper replacement of your ABS module requires obtaining the correct part. If opting for a DIY approach, purchase from a reputable company or seek assistance from a professional for a reliable replacement.
Remember that merely replacing the module is only part of the process; the associated wires and hoses need removal as well.
This hour-long to two-hour procedure demands basic equipment or an auto service center. Successful execution ensures the restoration of your car to optimal condition.
Adjusting Your Wheel Sensors
For a self-adjustment of wheel sensors, gather a wrench, a screwdriver, and some patience. If uncertain, it is advisable to have an auto shop handle this task.
For the confident DIYer, follow these steps: use a wrench or socket set to remove the bolts securing the wheel sensor in place. With the bolts removed, employ pliers to delicately extract them from their sockets, while holding onto the rubber gasket to prevent any mishaps.
Take careful note of the orientation of each sensor before removal, as precise reinstallation is crucial. To prevent potential damage to your car's steering system, seek guidance if uncertain to ensure proper reassembly.
Nick Marchenko, PhD
Industrial Engineer & Automotive Content Specialist
Nick writes in-depth guides on car clubs, engine specs, vehicle ownership, and modifications, combining engineering knowledge with automotive passion.
Full profile → LinkedIn →You May Also Like
Ford F150 Shift System Fault
2 years agoTired of consistently encountering the notification that reads, "Shift system fault, service required," but unclear about its meaning, origin, and how to address the issue? Keep reading t...
Ford F150 Terrain Management System Fault
2 years agoOwning a Ford F150 implies more than just cruising on smooth roads; this robust vehicle is tailored for rugged terrains, equipped with features like the terrain management system. When this system...
Ford F-150 Starting System Fault
2 years agoFew things are more exasperating for a car owner than attempting to start their vehicle only to discover that it will not respond to the turn of the key. While the starting system of a Ford F-150 is g...
Ford F150 Tire Pressure Sensor Fault
2 years agoTire pressure monitoring systems (TPMS) have been made compulsory in all American vehicles as a government-mandated measure aimed at bolstering road safety. The primary purpose of TPMS is to monito...
Ford F-150 Transmission Fault Service
2 years agoWhile cruising in your Ford F-150, a sudden warning message appears: "Transmission fault, service now." What steps should you take when faced with this problem? We have delved into the issue...
Ford F-150 Brake Lamp Bulb Fault
2 years agoFord F-150 Brake Lamp Bulb Fault If you are like most people, the appearance of a warning light on your dashboard, especially the brake lamp indicator, can be anxiety-inducing, given the critical role...