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

586 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 symptoms, diagnostic steps, and repair instructions.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always allow the brake system to cool before working on it.
•Ensure the vehicle is securely lifted and supported when removing wheels.

Symptoms

•Spongy brake pedal feel
•Brake pedal travels down to the floor
•Decreased braking response
•Possible brake warning light illuminated
•Increased stopping distance

Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for any visible brake fluid leaks in the brake lines, calipers, and master cylinder.
3
Examine the condition of the brake pads and rotors for wear.
4
Inspect brake lines for air bubbles by performing a brake bleed.
5
Use a pressure gauge to check brake line pressure.
6
Scan for any error codes related to the braking system using an OBD-II scanner.

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
•Brake bleeder kit
•Socket set
•Torque wrench
•Safety goggles
•Gloves

Parts Required

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

Related Faults

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Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for any visible brake fluid leaks in the brake lines, calipers, and master cylinder.
3
Examine the condition of the brake pads and rotors for wear.
4
Inspect brake lines for air bubbles by performing a brake bleed.
5
Use a pressure gauge to check brake line pressure.
6
Scan for any error codes related to the braking system using an OBD-II scanner.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is off.
Wear safety goggles and gloves.

2. Check and Refill Brake Fluid

Open the master cylinder reservoir cap.
Inspect the brake fluid level; it should be between the minimum and maximum marks.
If low, refill with the correct type of brake fluid (DOT 3 or DOT 4, as specified in the owner's manual).

3. Inspect for Leaks

Visually check the brake lines, calipers, and master cylinder for any signs of fluid leaks.
If leaks are found, replace the damaged components.

4. Bleed the Brakes

Start with the wheel farthest from the master cylinder (usually the rear passenger side).
Use a brake bleeder kit or a helper to pump the brake pedal.
- Have the helper press the brake pedal and hold it down.
- Open the bleeder valve on the brake caliper to release air and fluid.
- Close the valve before the helper releases the pedal.
Repeat until no air bubbles appear in the fluid.
Move to the next wheel and repeat the process until all wheels are bled.

5. Inspect and Replace Brake Pads and Rotors (if necessary)

Remove wheel lug nuts and take off the wheel.
Inspect brake pads for thickness; replace if worn below manufacturer specifications.
Check rotor surface for scoring or excessive wear; replace if necessary.
Reinstall new or cleaned components and torque lug nuts to the manufacturer's specifications (usually around 80-100 ft-lbs).

6. Final Checks

Recheck brake fluid level after bleeding the brakes.
Reinstall the master cylinder cap securely.