why does my Ford Explorer Fifth Generation (2011-2019) brake pedal feel spongy and goes to the floor

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

critical

Severity

3 min read

497 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 a spongy brake pedal in a Ford Explorer (2011-2019). 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

•Ensure the vehicle is secured on a flat surface before working on the brakes.
•Always wear safety glasses and gloves when handling brake fluid, as it can damage paint and is harmful to skin.

Symptoms

•Spongy brake pedal feel
•Brake pedal goes to the floor
•Reduced braking effectiveness
•Increased stopping distance
•Brake warning light illuminated

Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for any visible leaks in brake lines or at wheel cylinders.
3
Examine brake pads and rotors for wear and damage.
4
Test the brake booster for proper operation.
5
Scan for any error codes related to the braking system using an OBD-II scanner.
6
Perform a brake fluid quality test to check for contamination or air.

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 bleeder kit
•Socket set
•Wrench set
•Torque wrench
•Turkey baster
•Clear tubing

Parts Required

•Brake fluid (DOT 3 or DOT 4)
•Brake pads (if replacement is necessary)
•Brake rotors (if replacement is necessary)
•Brake lines or hoses (if damaged)

Related Faults

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Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for any visible leaks in brake lines or at wheel cylinders.
3
Examine brake pads and rotors for wear and damage.
4
Test the brake booster for proper operation.
5
Scan for any error codes related to the braking system using an OBD-II scanner.
6
Perform a brake fluid quality test to check for contamination or air.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface.
Secure the vehicle with wheel chocks and jack stands.

2. Inspect and Replace Brake Fluid

Sub-steps:
1. Open the master cylinder reservoir cap.
2. Remove any old brake fluid using a turkey baster.
3. Refill with the manufacturer-recommended brake fluid (usually DOT 3 or DOT 4).
4. Replace the reservoir cap securely.

3. Bleed the Brake System

Sub-steps:
1. Start with the brake farthest from the master cylinder (typically the right rear).
2. Attach a clear hose to the bleeder screw and place the other end in a container.
3. Have an assistant press the brake pedal several times and hold it down.
4. Open the bleeder screw to release air and fluid, then close it before releasing the brake pedal.
5. Repeat until no air bubbles appear in the fluid.
6. Move to the left rear, right front, and finish with the left front, following the same process.

4. Inspect and Replace Brake Components

Sub-steps:
1. Remove wheel covers and tires to access brake components.
2. Inspect brake pads for wear; replace if worn below specifications.
3. Check the rotors for scoring or warping; machine or replace as necessary.
4. Replace any damaged brake lines or hoses.
5. Reassemble wheels and lower the vehicle.

5. Test the Brake System

Sub-steps:
1. Start the vehicle and pump the brake pedal to build pressure.
2. Check for leaks around the brake components.
3. Test drive the vehicle at low speeds to assess braking effectiveness.

Tools Required:

Brake bleeder kit
Socket set
Wrench set
Torque wrench
Turkey baster
Clear tubing

Parts Required:

Brake fluid (DOT 3 or DOT 4)
Brake pads (if replacement is necessary)
Brake rotors (if replacement is necessary)
Brake lines or hoses (if damaged)

Estimated Repair Time: 2-4 hours

Safety Warnings:

Ensure the vehicle is secured on a flat surface before working on the brakes.
Always wear safety glasses and gloves when handling brake fluid, as it can damage paint and is harmful to skin.