my Ford Explorer's brake pedal goes to the floor, what should I do?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

critical

Severity

3 min read

560 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 brake pedal issues 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 goggles and gloves when working on brake systems.
•Allow the vehicle to cool before working on brake components.
•Ensure the vehicle is securely supported when lifted.

Symptoms

•Brake pedal travels to the floor with little resistance
•Warning light for brakes illuminated on the dashboard
•Reduced braking effectiveness
•Possible fluid leakage underneath the vehicle
•Brake fluid reservoir low or empty

Diagnostic Steps

1
Inspect the brake fluid reservoir for fluid level and condition.
2
Check for visible leaks in brake lines, master cylinder, and wheel cylinders.
3
Examine the brake pads and rotors for wear.
4
Test the brake booster for proper operation.
5
Scan the vehicle’s onboard diagnostic system for any error codes.

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 line flare tool
•Socket set
•Torque wrench
•Brake fluid

Parts Required

•Brake lines (if damaged)
•Master cylinder (if defective)
•Brake fluid

Related Faults

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Diagnostic Steps

1
Inspect the brake fluid reservoir for fluid level and condition.
2
Check for visible leaks in brake lines, master cylinder, and wheel cylinders.
3
Examine the brake pads and rotors for wear.
4
Test the brake booster for proper operation.
5
Scan the vehicle’s onboard diagnostic system for any error codes.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and secure it with wheel chocks.
Disconnect the battery to prevent any electrical issues during the repair.

2. Inspect and Repair Brake Lines

Tools Required: Wrench set, brake line flare tool.
Sub-steps:
1. Lift the vehicle using a jack and secure it with jack stands.
2. Inspect all brake lines for signs of corrosion or leaks.
3. If a leak is found, replace the damaged section of the brake line using the brake line flare tool to create proper fittings.
4. Bleed the brake system after replacing any brake lines to remove air from the system.

3. Replace Master Cylinder (if necessary)

Tools Required: Socket set, torque wrench.
Sub-steps:
1. Locate the master cylinder on the firewall.
2. Disconnect the brake lines from the master cylinder, using a line wrench to avoid damage.
3. Unbolt the master cylinder from the firewall and remove it.
4. Install the new master cylinder, ensuring all connections are tight.
5. Reconnect the brake lines and torque to manufacturer specifications.

4. Brake Fluid Replacement

Tools Required: Brake fluid, funnel, container for old fluid.
Sub-steps:
1. Fill the brake fluid reservoir with the appropriate brake fluid type (DOT 3, DOT 4, etc.).
2. Bleed the brake system at each wheel, starting from the farthest wheel from the master cylinder.
3. Ensure that fluid is flowing without bubbles during the bleeding process.

5. Reassemble and Test

Sub-steps:
1. Reconnect the battery.
2. Lower the vehicle from jack stands.
3. Conduct a brake test by pressing the pedal to confirm proper engagement and resistance.