why does my Ford Explorer's brake pedal go to the floor?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

critical

Severity

3 min read

566 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 why your Ford Explorer's brake pedal goes to the floor and how to fix it. Step-by-step diagnostic and repair instructions included.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Allow the vehicle to cool before working on any components.
•Always wear safety glasses and gloves when working with brake fluid.

Symptoms

•Brake pedal feels soft or spongy when pressed
•Brake warning light illuminated on the dashboard
•Reduced braking effectiveness
•Fluid leaks under the vehicle
•Noise from the brake system during operation

Diagnostic Steps

1
Inspect the brake fluid reservoir for proper fluid level.
2
Check for any visible leaks in brake lines, hoses, and around the master cylinder.
3
Use a brake fluid tester to check for moisture contamination in the fluid.
4
Inspect brake pads and rotors for wear and damage.
5
Check for air in the brake lines by performing a brake bleed.

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

•Wrench set
•Brake bleeder kit
•Socket set
•Torque wrench

Parts Required

•Brake fluid (DOT 3 or DOT 4)
•Replacement brake lines or hoses (if needed)
•New master cylinder (if necessary)

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Diagnostic Steps

1
Inspect the brake fluid reservoir for proper fluid level.
2
Check for any visible leaks in brake lines, hoses, and around the master cylinder.
3
Use a brake fluid tester to check for moisture contamination in the fluid.
4
Inspect brake pads and rotors for wear and damage.
5
Check for air in the brake lines by performing a brake bleed.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is on a level surface and secure it with wheel chocks.
Wear safety glasses and gloves.

2. Inspect and Repair Leaks

Check Brake Fluid Reservoir: Ensure that the reservoir is filled to the recommended level. If low, refill with the appropriate brake fluid type (DOT 3 or DOT 4).
Inspect Brake Lines and Hoses: Examine all brake lines and hoses for signs of wear, cracks or leaks. Replace any damaged components.
- Tools: Wrench set, brake line wrench.
- Parts: Replacement brake lines or hoses as needed.

3. Bleed the Brake System

Gather Bleeding Tools: Use a brake bleeder kit or a clear hose attached to the bleeder valve.
Bleed Each Wheel: Starting with the furthest wheel from the master cylinder (usually the passenger rear):
- Open the bleeder valve and have an assistant press the brake pedal several times.
- Close the valve before they release the pedal.
- Repeat until no air bubbles appear in the fluid.
- Move to the next wheel, following the order: passenger rear, driver rear, passenger front, driver front.
- Tools: Brake bleeder kit, wrench for bleeder valves.

4. Inspect and Replace the Master Cylinder (if necessary)

Check for Master Cylinder Failure: If the pedal still goes to the floor after bleeding the system, the master cylinder may be faulty.
Remove the Master Cylinder: Disconnect brake lines and mounting bolts, then remove it from the brake booster.
- Tools: Wrench set, socket set.
Install New Master Cylinder: Install the new master cylinder and connect the brake lines, ensuring they are tight.
- Torque specifications: Refer to the vehicle service manual for exact torque values.