why does my Toyota Corolla E170 (2013-2019) brake pedal feel spongy and goes to the floor

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

critical

Severity

3 min read

565 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 your 2013-2019 Toyota Corolla E170. 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 gloves and goggles when working with brake fluid, as it can damage paint and is harmful to skin.
•Ensure the vehicle is securely elevated on jack stands if working underneath.

Symptoms

•Spongy brake pedal feel
•Brake pedal travels to the floor
•Reduced braking effectiveness
•Increased stopping distance
•Possible brake warning light illuminated on the dashboard

Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for any visible leaks in brake lines, hoses, or around the calipers.
3
Test the brake booster for proper function by pressing the brake pedal several times with the engine off and then starting the engine to see if the pedal drops.
4
Use a brake line pressure gauge to check for consistent pressure while the brake pedal is pressed.
5
Scan the vehicle for any ABS or brake-related error codes using an OBD-II scanner.

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
•Funnel
•Wrench set
•Brake line inspection tool
•Brake bleeder kit

Parts Required

•Brake fluid (DOT 3 or DOT 4)
•Brake lines or hoses (if damaged)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Inspect brake fluid level in the master cylinder reservoir.
2
Check for any visible leaks in brake lines, hoses, or around the calipers.
3
Test the brake booster for proper function by pressing the brake pedal several times with the engine off and then starting the engine to see if the pedal drops.
4
Use a brake line pressure gauge to check for consistent pressure while the brake pedal is pressed.
5
Scan the vehicle for any ABS or brake-related error codes using an OBD-II scanner.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is on level ground and the engine is off.
Wear safety gloves and goggles.

2. Check and Refill Brake Fluid

Tools Required: Brake fluid, funnel
Inspect the brake fluid level in the master cylinder reservoir.
If low, refill the reservoir with the appropriate type of brake fluid (usually DOT 3 or DOT 4).
Check for any signs of contamination (dark color, debris).

3. Inspect Brake Lines and Components

Tools Required: Wrench set, brake line inspection tool
Carefully inspect all brake lines, hoses, and calipers for leaks or damage.
Tighten any loose fittings and replace any damaged lines or hoses.

4. Bleed the Brake System

Tools Required: Brake bleeder kit, wrench
Begin bleeding at the farthest wheel from the master cylinder (usually the right rear).
Attach the bleeder kit to the brake caliper bleeder valve.
Open the valve and have an assistant press the brake pedal multiple times until fluid flows without bubbles, then close the valve.
Repeat for each wheel in the order: right rear, left rear, right front, left front.
Keep the master cylinder reservoir topped off during this process to avoid introducing air.

5. Test the Brake System

Tools Required: None
After bleeding, take the vehicle for a short test drive at low speeds to check for proper brake function.
Ensure that the brake pedal feels firm and does not travel excessively.