what causes my Ford F-150 13th Generation (2015-2020) brakes to feel spongy

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

Error Codes

2-4 hours

Time

medium

Difficulty

critical

Severity

3 min read

580 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 spongy brakes in Ford F-150 13th Generation (2015-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Ensure the vehicle is on a flat surface and securely supported.
•Allow the vehicle to cool down before inspecting brake components.

Symptoms

•Spongy brake pedal feel
•Increased stopping distance
•Brake warning light illuminated
•Brake fluid leak under the vehicle
•Air noise or hissing sound when pressing the brake pedal

Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for brake fluid leaks around the brake lines, calipers, and master cylinder.
3
Use an OBD-II scanner to check for any related error codes.
4
Inspect brake pads and rotors for wear and proper installation.
5
Perform a brake pedal feel test to assess firmness and travel distance.
6
Check the brake booster for proper operation and vacuum supply.

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

•Brake fluid
•Wrench set
•Brake bleeder kit
•OBD-II scanner

Parts Required

•Brake fluid (DOT 3 or DOT 4)
•Brake pads (if worn)
•Brake rotors (if damaged)

Related Faults

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Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for brake fluid leaks around the brake lines, calipers, and master cylinder.
3
Use an OBD-II scanner to check for any related error codes.
4
Inspect brake pads and rotors for wear and proper installation.
5
Perform a brake pedal feel test to assess firmness and travel distance.
6
Check the brake booster for proper operation and vacuum supply.

Solution

1. Preparation

Tools Required:
- Brake fluid
- Wrench set
- Brake bleeder kit
- OBD-II scanner
Safety Warnings:
- Disconnect the battery before working on electrical systems.
- Ensure the vehicle is on a flat surface and securely supported.

2. Inspect and Address Fluid Level

Open the hood and locate the master cylinder.
Check the brake fluid level; if low, add the recommended brake fluid type (usually DOT 3 or DOT 4).
Inspect for any visible leaks around the master cylinder and brake lines.

3. Bleed the Brake System

Tools Required: Brake bleeder kit
Begin with the wheel farthest from the master cylinder (usually the passenger side rear).
Attach the brake bleeder kit to the bleeder valve on the brake caliper.
Have an assistant pump the brake pedal several times and hold it down.
Open the bleeder valve to release air and fluid, then close it before the pedal is released.
Repeat this process until no air bubbles are present in the fluid stream, then move to the next wheel (driver's side rear, passenger side front, driver’s side front).
Ensure the brake fluid level in the master cylinder remains full during the bleeding process.

4. Inspect Brake Components

Remove the wheel to access the brake components.
Check the brake pads for wear; replace if they are below the manufacturer's minimum thickness.
Inspect the rotors for warping or scoring; resurface or replace as needed.

5. Check the Brake Booster

Inspect the brake booster for signs of wear or damage.
Ensure the vacuum line to the brake booster is intact and properly connected.
If the booster is faulty, replace it according to manufacturer specifications.