why does my Ford Explorer's brake pedal feel spongy

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

545 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. 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 wear safety equipment when working on the braking system.
•Ensure the vehicle is securely lifted and supported before working underneath.

Symptoms

•Spongy brake pedal feel when pressed
•Longer stopping distances than usual
•Brake warning light illuminated on the dashboard
•Brake fluid leaking under the vehicle
•Unusual noises when applying brakes (squeaking or grinding)

Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Look for signs of leaks around brake lines, hoses, and calipers.
3
Conduct a visual inspection of the brake components, including pads and rotors.
4
Check for air in the brake lines by performing a brake bleed procedure.
5
Use a multimeter to check the brake pedal switch for proper operation.
6
Scan the vehicle’s onboard diagnostics for any error codes related to the braking system.

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
•Wrench set
•Socket set
•Torque wrench
•Screwdriver set

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
Look for signs of leaks around brake lines, hoses, and calipers.
3
Conduct a visual inspection of the brake components, including pads and rotors.
4
Check for air in the brake lines by performing a brake bleed procedure.
5
Use a multimeter to check the brake pedal switch for proper operation.
6
Scan the vehicle’s onboard diagnostics for any error codes related to the braking system.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the parking brake is engaged.
Wear safety glasses and gloves.

2. Inspect and Top Off Brake Fluid

Open the hood and locate the master cylinder reservoir.
Check the brake fluid level; if low, add the manufacturer-recommended brake fluid (DOT 3 or DOT 4).
If the fluid is contaminated (dark or gritty), proceed to flush the system.

3. Brake Bleeding

Starting with the brake farthest from the master cylinder (usually the right rear), attach a clear hose to the bleeder valve.
Open the bleeder screw and have an assistant press the brake pedal several times until no air bubbles appear in the fluid.
Close the bleeder screw and repeat for each brake in the following order: right rear, left rear, right front, left front.
Ensure the master cylinder does not run low on fluid during this process.

4. Inspect Brake Components

Remove the wheel for each brake being inspected.
Check brake pads for thickness; replace if below manufacturer's specifications.
Inspect rotors for wear or scoring; resurface or replace if needed.
Check calipers for proper operation and leaks; replace if damaged.

5. Reassemble and Test

Reinstall the wheels and lower the vehicle back to the ground.
Test the brake pedal feel and ensure it is firm before taking the vehicle for a test drive.