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

574 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 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

•Always ensure the vehicle is securely lifted and supported before working on brake components.
•Wear gloves and eye protection 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
•Longer stopping distances
•Increased brake travel before engaging
•Brake warning light illuminated on the dashboard

Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for visible leaks in brake lines, calipers, and wheel cylinders.
3
Perform a brake fluid quality test to check for contamination or air.
4
Inspect brake pads and rotors for wear or damage.
5
Use a scan tool to check for any relevant diagnostic trouble codes (DTCs).

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
•Brake fluid

Parts Required

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

Related Faults

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Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for visible leaks in brake lines, calipers, and wheel cylinders.
3
Perform a brake fluid quality test to check for contamination or air.
4
Inspect brake pads and rotors for wear or damage.
5
Use a scan tool to check for any relevant diagnostic trouble codes (DTCs).

Solution

1. Preparation

Gather tools and parts needed for the repair.
Ensure the vehicle is on a flat surface and engage the parking brake.
Disconnect the negative battery terminal for safety.

2. Inspect and Replace Brake Fluid

Sub-steps:
1. Remove the master cylinder reservoir cap and check the fluid level.
2. If low, top off with manufacturer-recommended brake fluid (DOT 3 or DOT 4).
3. If the fluid is contaminated or old, proceed to flush the brake system.
4. Use a brake bleeder kit to perform a full brake fluid flush, ensuring all old fluid is removed.

3. Check for Leaks

Sub-steps:
1. Visually inspect all brake lines and hoses for signs of leakage.
2. Check calipers and wheel cylinders for fluid leaks.
3. If leaks are found, replace the damaged component (e.g., brake line, caliper, or wheel cylinder).

4. Bleed the Brakes

Sub-steps:
1. Reconnect the negative battery terminal.
2. Start from the wheel farthest from the master cylinder (right rear) and work towards the nearest (left front).
3. Attach a bleeder hose to the bleeder valve and submerge it in a container of brake fluid.
4. Have an assistant pump the brake pedal several times, then hold it down.
5. Open the bleeder valve to release air and fluid, then close it before the pedal is released.
6. Repeat until no air bubbles appear in the fluid.

5. Inspect and Replace Brake Components

Sub-steps:
1. Remove wheel assemblies to access brake components.
2. Inspect brake pads and rotors for wear; replace them if they are below manufacturer specifications.
3. If necessary, replace any damaged or worn components.