why does my Ford Explorer Fifth Generation (2011-2019) have a hard brake pedal

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

critical

Severity

4 min read

640 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 to diagnose and fix hard brake pedal issues 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 electrical systems.
•Allow the brake system to cool before touching components.

Symptoms

•Hard brake pedal with little to no travel
•Increased stopping distances
•Brake warning light illuminated on the dashboard
•Hissing sound when pressing the brake pedal
•Difficulty engaging the brakes when the engine is off
•Reduced braking power during operation

Diagnostic Steps

1
Inspect the brake fluid level in the master cylinder reservoir.
2
Check for any visible leaks in the brake lines or at the calipers and wheel cylinders.
3
Test the brake booster by pressing the brake pedal with the engine off and then starting the engine.
4
Use a vacuum gauge to measure the vacuum in the brake booster.
5
Scan the vehicle for any diagnostic trouble codes (DTCs) related to the brake system using an OBD-II scanner.
6
Inspect the vacuum lines for any cracks or disconnections.

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 fluid
•Funnel
•Socket set
•Wrenches
•Vacuum gauge
•Brake bleeder kit
•Torque wrench

Parts Required

•Brake booster (if faulty)
•Brake fluid (DOT 3 or DOT 4)

Related Faults

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Diagnostic Steps

1
Inspect the brake fluid level in the master cylinder reservoir.
2
Check for any visible leaks in the brake lines or at the calipers and wheel cylinders.
3
Test the brake booster by pressing the brake pedal with the engine off and then starting the engine.
4
Use a vacuum gauge to measure the vacuum in the brake booster.
5
Scan the vehicle for any diagnostic trouble codes (DTCs) related to the brake system using an OBD-II scanner.
6
Inspect the vacuum lines for any cracks or disconnections.

Solution

1. Preparation

Gather tools and parts required for the repair.
Ensure the vehicle is on a level surface and securely supported on jack stands.
Disconnect the negative battery cable to prevent electrical shorts.

2. Check and Refill Brake Fluid

Tools Required: Brake fluid, funnel
Remove the master cylinder cap and inspect the brake fluid level.
If low, refill with the appropriate type of brake fluid (DOT 3 or DOT 4 as specified).
Replace the master cylinder cap securely.

3. Inspect and Replace Brake Booster

Tools Required: Socket set, wrenches, vacuum gauge
Disconnect the vacuum hose from the brake booster.
Remove the mounting nuts/bolts securing the brake booster to the firewall.
Detach the push rod from the brake pedal by removing the retaining clip.
Carefully pull the brake booster from the firewall and replace it with a new one.
Reinstall the push rod and secure it with the retaining clip.
Reattach the vacuum hose and ensure it is secure.

4. Bleed the Brake System

Tools Required: Brake bleeder kit, brake fluid
Start at the wheel farthest from the master cylinder and work towards the closest.
Have an assistant pump the brake pedal while you open each bleeder valve to release air.
Keep the brake fluid reservoir topped up during this process to avoid introducing air into the system.

5. Final Checks

Tools Required: Torque wrench
Recheck all connections, ensuring they are secure.
Test the brake pedal feel by pressing it several times; it should feel firm.
Reconnect the battery cable.