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

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

575 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 Fifth Generation (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

•Ensure the vehicle is securely supported on jack stands before working underneath.
•Always wear safety gear when handling brake fluid as it can damage paint and surfaces.

Symptoms

•Spongy or soft brake pedal feel
•Longer stopping distance
•Brake warning light illuminated
•Potential loss of brake fluid
•Air hissing sound when pressing the brake pedal

Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for visible leaks in brake lines, hoses, and around wheel cylinders or calipers.
3
Inspect brake pads and rotors for wear and proper installation.
4
Scan for any error codes related to the braking system using an OBD-II scanner.
5
Test the brake booster for proper operation by pumping the brake pedal with the engine off and then starting the engine to see if the pedal drops.
6
Bleed the brake lines to remove any trapped air.

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
•Socket set
•Turkey baster
•Clear tubing for bleeding brakes
•Brake fluid (DOT 3 or DOT 4)

Parts Required

•Brake fluid (if low)
•Brake lines or hoses (if damaged)

Related Faults

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Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for visible leaks in brake lines, hoses, and around wheel cylinders or calipers.
3
Inspect brake pads and rotors for wear and proper installation.
4
Scan for any error codes related to the braking system using an OBD-II scanner.
5
Test the brake booster for proper operation by pumping the brake pedal with the engine off and then starting the engine to see if the pedal drops.
6
Bleed the brake lines to remove any trapped air.

Solution

1. Preparation

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

2. Inspect and Repair Brake Lines

Sub-steps:
- Visually inspect all brake lines and connections for leaks or damage.
- If leaks are found, replace the affected brake line or hose using a socket set.
- Torque the connections to manufacturer specifications (usually around 18-25 ft-lbs).

3. Replace Brake Fluid

Sub-steps:
- Use a turkey baster to remove old brake fluid from the master cylinder reservoir.
- Refill with fresh brake fluid (DOT 3 or DOT 4 as specified).
- Ensure the fluid level is at the recommended level.

4. Bleed the Brakes

Sub-steps:
- Start with the wheel farthest from the master cylinder (usually the passenger side rear).
- Attach a clear hose to the bleeder valve on the brake caliper and submerge the other end in a container with brake fluid.
- Have an assistant pump the brake pedal several times and hold it down.
- Open the bleeder valve to release air and fluid, then close it before your assistant releases the pedal.
- Repeat until clear fluid comes out without bubbles, and then move to the next wheel in the following order: driver side rear, passenger side front, driver side front.

5. Inspect Brake Booster

Sub-steps:
- Check the brake booster by starting the engine and pressing the brake pedal. If the pedal drops significantly, the booster is functioning correctly.
- If the pedal does not drop, consider replacing the brake booster.