why does my Honda Civic 10th Generation (2016-2021) brake light keep coming on

Honda Civic 11th Generation (2022-Present)

Error Codes

1-3 hours

Time

medium

Difficulty

high

Severity

3 min read

564 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 the brake light issue in Honda Civic 10th Generation (2016-2021). Step-by-step guide with symptoms, diagnostics, and repair instructions.

Affected Component

Brakes

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Ensure the vehicle is secure on a flat surface before lifting or removing wheels.

Symptoms

•Brake light remains illuminated on the dashboard
•Possible warning message displayed on the instrument cluster
•Reduced brake performance or sensitivity
•Brake pedal feels spongy or unresponsive
•Fluid leaks observed under the vehicle

Diagnostic Steps

1
Inspect the brake fluid level in the master cylinder reservoir.
2
Scan for error codes using an OBD-II scanner to identify any related issues.
3
Check the brake light switch for proper operation and adjustment.
4
Inspect the brake pads and rotors for wear or damage.
5
Examine the wiring and connections related to the brake lights and switch.
6
Test the brake pedal for proper travel and response.

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
•Multimeter
•Socket set
•Torque wrench
•Screwdriver set

Parts Required

•Brake light switch (if replacement is necessary)
•Brake pads (if worn)
•Brake rotors (if damaged)

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Diagnostic Steps

1
Inspect the brake fluid level in the master cylinder reservoir.
2
Scan for error codes using an OBD-II scanner to identify any related issues.
3
Check the brake light switch for proper operation and adjustment.
4
Inspect the brake pads and rotors for wear or damage.
5
Examine the wiring and connections related to the brake lights and switch.
6
Test the brake pedal for proper travel and response.

Solution

1. Preparation

Gather tools and parts required for the repair.
Ensure the vehicle is parked on a flat surface and the parking brake is engaged.
Disconnect the battery to prevent electrical shorts.

2. Check and Top Off Brake Fluid

Locate the master cylinder reservoir.
Inspect the brake fluid level; if low, top off with the manufacturer's recommended brake fluid type.
Reconnect the battery and check if the brake light remains off.

3. Inspect Brake Light Switch

Locate the brake light switch, usually positioned near the brake pedal.
Remove the switch by disconnecting the wiring harness and unscrewing it from its mount.
Test the switch using a multimeter for continuity when the pedal is pressed.
If defective, replace the switch with a new one, ensuring proper alignment and connection.

4. Inspect Brake Components

Remove the wheels to access the brake pads and rotors.
Inspect the brake pads for thickness (minimum 3mm recommended) and check for uneven wear.
Check the rotors for scoring, warping, or other damage.
Replace brake pads or rotors if necessary, following proper installation procedures.

5. Check Wiring and Connections

Visually inspect the wiring connected to the brake light switch and lights for fraying or disconnection.
Repair any damaged wiring or connections, ensuring a secure fit.

6. Final Checks

Reassemble any removed components and ensure all fasteners are torqued to manufacturer specifications.
Reconnect the battery and test the brake system by pressing the brake pedal and checking for proper function of the brake lights.