what causes the electric power steering to fail on my Ford F-150

Ford F-150 13th Generation (2015-2020)

Error Codes

2-4 hours

Time

medium

Difficulty

critical

Severity

3 min read

549 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix electric power steering failure in Ford F-150. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Steering

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the vehicle to cool down before performing any maintenance.

Symptoms

•Steering wheel feels heavy or unresponsive
•"Power Steering" warning light illuminated on the dashboard
•Intermittent power steering assistance
•No power steering assist at low speeds
•Grinding noise when turning the steering wheel
•Increased effort required to turn the steering wheel

Diagnostic Steps

1
Scan the vehicle's onboard diagnostics using an OBD-II scanner for any stored error codes related to the EPS system.
2
Inspect the power steering fluid level and condition, ensuring it is at the correct level and free of contaminants.
3
Check the EPS motor and electrical connections for any signs of damage, wear, or corrosion.
4
Test the EPS system voltage and ground connections using a multimeter to ensure proper electrical supply.
5
Inspect the steering column for any obstructions or mechanical issues that may affect EPS operation.
6
Verify the operation of the steering angle sensor and torque sensor for any malfunctions.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Multimeter
•Socket set
•Torque wrench
•Screwdriver set

Parts Required

•Replacement EPS motor (if faulty)
•Power steering fluid

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Diagnostic Steps

1
Scan the vehicle's onboard diagnostics using an OBD-II scanner for any stored error codes related to the EPS system.
2
Inspect the power steering fluid level and condition, ensuring it is at the correct level and free of contaminants.
3
Check the EPS motor and electrical connections for any signs of damage, wear, or corrosion.
4
Test the EPS system voltage and ground connections using a multimeter to ensure proper electrical supply.
5
Inspect the steering column for any obstructions or mechanical issues that may affect EPS operation.
6
Verify the operation of the steering angle sensor and torque sensor for any malfunctions.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to ensure safety before working on the electrical components.

2. Inspect and Replace EPS Motor

Tools Required: Socket set, torque wrench, multimeter, screwdriver set.
Remove the EPS motor assembly from the steering column.
- Unscrew and disconnect any mounting bolts or screws.
- Carefully detach any electrical connectors.
Inspect the motor for signs of wear or damage.
If the motor is faulty, replace it with a new unit.
- Install the new EPS motor by reversing the removal steps.
- Ensure all bolts are torqued to manufacturer specifications.

3. Check and Repair Electrical Connections

Inspect and clean all electrical connectors related to the EPS system.
Use a multimeter to test for continuity in wiring harnesses and repair any damaged wires.
Reconnect all electrical connectors securely.

4. Refill and Bleed Power Steering Fluid

Inspect the power steering fluid reservoir and refill with the recommended fluid type.
Bleed the EPS system to remove any air pockets by turning the steering wheel from lock to lock several times while the engine is running.

5. Reconnect Battery and Test

Reconnect the battery and start the vehicle.
Check for any warning lights on the dashboard and ensure the EPS system operates smoothly.