how to fix Ford F-150 13th Generation (2015-2020) brake pedal goes to floor?

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

Error Codes

2-4 hours

Time

medium

Difficulty

critical

Severity

4 min read

607 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 the brake pedal going to the floor in a Ford F-150 (2015-2020). Step-by-step guide with symptoms and repair instructions.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always wear safety goggles and gloves when handling brake fluid, as it can damage paint and skin.
•Ensure the vehicle is securely supported on jack stands before working underneath.

Symptoms

•Brake pedal feels soft or spongy
•Reduced braking effectiveness
•Warning light for brake system illuminated on the dashboard
•Brake fluid leaking under the vehicle
•Unusual noises when pressing the brake pedal (e.g., hissing or grinding)

Diagnostic Steps

1
Inspect the brake fluid reservoir for low fluid levels.
2
Check for visible leaks in brake lines, hoses, and around the master cylinder.
3
Inspect the brake pads and rotors for wear and damage.
4
Use a scan tool to check for any error codes related to the braking system.
5
Perform a brake fluid pressure test to check for leaks within the system.
6
Bleed the brakes to remove any air trapped in the brake lines.

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

•Wrench set
•Flare nut wrench
•Brake bleeder kit
•Clear tubing
•Container for brake fluid

Parts Required

•Brake fluid (DOT 3 or DOT 4)
•Replacement brake lines (if necessary)
•Brake pads (if worn)

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Diagnostic Steps

1
Inspect the brake fluid reservoir for low fluid levels.
2
Check for visible leaks in brake lines, hoses, and around the master cylinder.
3
Inspect the brake pads and rotors for wear and damage.
4
Use a scan tool to check for any error codes related to the braking system.
5
Perform a brake fluid pressure test to check for leaks within the system.
6
Bleed the brakes to remove any air trapped in the brake lines.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is on a level surface and secure it with wheel chocks.
Wear safety goggles and gloves.

2. Check Brake Fluid Level

Locate the brake fluid reservoir.
If low, top off with the recommended brake fluid (DOT 3 or DOT 4).
Inspect for leaks; if present, proceed to the next step.

3. Inspect and Replace Brake Lines (if necessary)

Tools Required: Wrench set, brake line cutter, flare nut wrench
Remove any damaged brake lines by using a flare nut wrench to disconnect.
Cut the new brake line to the required length and install it, ensuring all connections are tight.
Use a torque wrench to tighten connections to manufacturer specifications.

4. Bleed the Brake System

Tools Required: Brake bleeder kit, clear tubing, container
Start with the wheel farthest from the master cylinder (right rear).
Attach clear tubing to the bleeder screw and place the other end in a container.
Have an assistant pump the brake pedal several times and hold it down.
Open the bleeder screw to release air and fluid, then close it before the pedal is released.
Repeat until no air bubbles are visible, then move to the next wheel (left rear, right front, left front).
Ensure the brake fluid reservoir remains full throughout the process.

5. Test the Brake System

Start the engine and pump the brake pedal to check for firmness.
Take the vehicle for a short test drive to ensure proper braking functionality.