why is my Ford Explorer Fifth Generation (2011-2019) brake pedal soft and goes to the floor

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

critical

Severity

3 min read

581 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 soft brake pedal issue in 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

•Disconnect the battery before working on the brake system.
•Allow the vehicle to cool before working on brake components.

Symptoms

•Brake pedal feels soft or spongy
•Brake pedal goes to the floor when pressed
•Reduced braking effectiveness
•Possible brake warning light illuminated on the dashboard
•Fluid leaks visible under the vehicle

Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for any visible brake fluid leaks around brake lines, calipers, and master cylinder.
3
Scan for any error codes using an OBD-II scanner.
4
Test the master cylinder for proper function by performing a pressure test.
5
Inspect brake pads and rotors for wear or damage.
6
Bleed the brake system to remove any air pockets.

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 fluid
•Brake bleeder kit
•Socket set
•Torque wrench
•OBD-II scanner

Parts Required

•Brake fluid (DOT 3 or DOT 4)
•Brake lines (if damaged)
•Brake calipers (if leaking)
•Master cylinder (if faulty)

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Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for any visible brake fluid leaks around brake lines, calipers, and master cylinder.
3
Scan for any error codes using an OBD-II scanner.
4
Test the master cylinder for proper function by performing a pressure test.
5
Inspect brake pads and rotors for wear or damage.
6
Bleed the brake system to remove any air pockets.

Solution

1. Preparation

Tools Required: Brake fluid, brake bleeder kit, socket set, torque wrench, OBD-II scanner.
Ensure the vehicle is parked on a level surface and the engine is turned off.
Wear safety gloves and goggles.

2. Check Brake Fluid Level

Open the hood and locate the brake master cylinder.
Remove the cap and check the fluid level; it should be between the "MIN" and "MAX" marks.
If low, top off with manufacturer-recommended brake fluid (DOT 3 or DOT 4 as specified).

3. Inspect for Leaks

Visually inspect brake lines, calipers, and around the master cylinder for any signs of fluid leakage.
If leaks are found, replace the affected components (lines, calipers, or master cylinder).

4. Bleed the Brake System

Tools Required: Brake bleeder kit, wrench for bleeder screws.
Start at the wheel farthest from the master cylinder (usually the passenger rear).
Have an assistant pump the brake pedal several times and hold it down.
Open the bleeder screw to release air and fluid; close the screw before the pedal is released.
Repeat until clear fluid (without bubbles) flows from the bleeder screw.
Move to the next wheel and repeat the process until all wheels are bled.
Ensure the brake fluid reservoir is kept full during this process.

5. Test the Master Cylinder

If the pedal still feels soft after bleeding, remove the master cylinder.
Inspect the internal seals for wear; replace the master cylinder if necessary.
Reinstall the new master cylinder and bleed the system again.

6. Final Assembly and Testing

Reassemble any components removed for access.
Ensure all bolts are torqued to the manufacturer's specifications.
Recheck brake fluid level and top off if necessary.