When your dashboard brake light illuminates, take note. It’s your car’s way of telling you something’s amiss with its brakes – don’t ignore this warning sign. Your brakes serve a vital function and must always function perfectly to stop its journey smoothly and safely.
Ignoring the brake light on the dashboard could result in major repairs costing hundreds of dollars. Or worse yet, your brakes might simply give out.
Now, let’s discuss why your brake light is acting up and what solutions might exist to make sure both you and your car stay safe on the road. Let’s uncover its secrets together. Let’s dive right in.
What Does a Brake Light Warning on Your Dash Mean?
An illuminated brake light warning on your vehicle’s dashboard (usually red in color) is a sign that something’s wrong with your braking system.
This red brake warning light may appear as an exclamation point (“!”) inside of a circle or simply as a message that spells out the word “BRAKE.”
Besides this, many other brake-related lights on your dashboard can illuminate in response to different problems with the brake system.
Here’s how they may appear:
- Parking brake light: This one is usually a “P” in a circle.
- ABS warning light: This one’s easily recognizable as it spells out “ABS.”
- Brake pad warning light: This dash light is a circle with outer dashed lines.
- Brake service light: This dashboard light flashes a “SERVICE BRAKES SOON” message.
Types of brake lights on dashboard and meaning
Back in the day, vehicles came with only one brake light that alerts drivers when there is an issue with the braking system.
However, as cars got more complex the need for other braking systems came into play. Hence the need for more brake lights to notify drivers of brake issues.
Today, there are four brake lights in your car’s dash—brake service light, ABS, parking brake light, and brake pad wear indicator light. So when you say your brake light popped, which brake light are you referring to? Let’s find out.
#1. Brake service light.
Your car’s braking system is what helps stop your car every time you need to stop under normal driving conditions.
The illumination of the brake service light is an indication that there is an issue with your car’s main braking system. This brake symbol looks like an “i” written upside down.
Activating your parking brake can also make this light appear. However, if your parking brake was never engaged or the light didn’t go off after turning off the parking brake, chances are your brake system is faulty.
#2. Anti-locking brake system (ABS) light.
Your car’s anti-locking braking system helps prevent your car from sliding and helps you gain traction during a hard stop or when driving on slippery terrains.
The anti-locking brake warning light symbol written as ABS on your car’s dash alerts drivers when there is an issue with your car’s ABS.
So when the ABS light pops, try checking your anti-locking braking system. A faulty ABS not only causes wheel locking and losing control of your steering during a hard stop.
But it also causes your car’s brakes to act weirdly, even under normal conditions. You may also hear weird noises when braking.
#3. Parking brake light.
Your car’s parking brake, also called emergency brake, helps keep your car in a stationary position when parked.
But it can also be used to stop your car when your normal brake fails. While some cars’ parking brake symbol is the PARK light, others use the BRAKE or P indicator light.
The illumination of the parking brake light on your dashboard is an indication that your parking brake is either engaged or faulty.
Generally, the parking brake lights should turn on when the parking brake is turned on. If, however, the parking brake has been disengaged, but the light remains on, your parking brake may be faulty.
#4. The brake pad wear indicator light.
Brake pads provide friction used to stop a car. Typically, this pad contains a frictional material that helps it grab the rotors when the brake pedal is pushed. However, over time, they can wear down, prompting the light to come on.
The brake pad wear indicator light (for cars that have one) is used to tell drivers that their brake pads are worn down and need to be replaced.
What would cause the brake light on the dash to come on?
A brake light on the dashboard can indicate different problems, ranging from simple fixes to more serious issues.
Identifying the exact cause helps ensure safe driving and prevents further damage to the braking system.
Below are some of the most common reasons why the brake light remains on:
#1. Parking Brake is Engaged.
The dashboard light may stay on even if the parking brake is slightly engaged. This happens because most vehicles have a sensor that detects the position of the parking brake.
To fix this, check if the parking brake is fully disengaged. If the light remains on after release, an issue with the parking brake cable or sensor may need further inspection.
#2. Low Brake Fluid Levels.
Brake fluid plays a key role in the braking system by transmitting force from the pedal to the brake components.
When the fluid level is too low, it can affect braking efficiency and trigger the warning light. Signs of low brake fluid include a soft or spongy brake pedal, slow braking response, and visible leaks under the vehicle.
Locate the reservoir under the hood to check the fluid and ensure the level is within the recommended range.
If the fluid is low, refilling it may help, but if the issue persists, a leak or worn brake components may be the cause.
#3. ABS System Malfunction.
The anti-lock braking system (ABS) prevents wheel lockup during sudden stops, improving control on slippery surfaces.
If the ABS malfunctions, it may cause the brake warning light to stay on. A faulty ABS can lead to longer stopping distances and reduced braking stability. Common causes include damaged sensors, broken wiring, or issues with the ABS module.
If the ABS light stays on alongside the brake warning light, professional diagnostics may be needed to pinpoint the problem.
#4. Worn Brake Pads or Rotors.
Brake pads and rotors wear down over time, and many vehicles have sensors that trigger a dashboard warning when the pads reach a certain thickness.
Symptoms of worn-out brake pads include squeaking noises, longer stopping distances, and a pulsating brake pedal.
Rotors can also become uneven, leading to vibrations when braking. If the pads are worn, replacing them is the best option.
Resurfacing may work in some cases for rotors, but replacing them is recommended if they are too thin or heavily damaged.
#5. Brake Light Bulb Failure.
Some modern vehicles have a warning system that alerts drivers when a brake light bulb is out. This feature ensures proper visibility and safety on the road.
To check for a burnt-out bulb, have someone press the brake pedal while observing the rear lights. If a bulb is not working, replacing it with a matching model usually fixes the issue.
#6. Faulty Brake Sensors.
Brake sensors monitor different parts of the braking system and trigger warnings when issues are detected.
However, dirt or damage can cause false warnings, making the brake light stay on. Cleaning or replacing the affected sensor may solve the problem if no mechanical issues are found.
Some sensors require recalibration after replacement, which may need professional assistance.
#7. Electrical or Fuse Issues.
Blown fuses or wiring problems can also cause the brake light to stay on. Electrical faults can disrupt communication between the brake system and the dashboard, leading to incorrect warnings.
Checking the vehicle’s fuse box can help identify blown fuses, which can be replaced with a fuse of the same rating.
If wiring damage is suspected, a mechanic may be needed to inspect and repair the connections.
Consequences of Ignoring the Brake Light
Ignoring the brake light can have severe consequences, jeopardizing your safety and the safety of others on the road. Here’s why it’s crucial to address this warning promptly:
#1. Reduced Braking Performance.
A malfunctioning braking system can significantly reduce your vehicle’s stopping power. This can lead to longer stopping distances, making it more difficult to avoid collisions, especially in emergency situations.
#2. Brake Failure.
In severe cases, ignoring the brake light can lead to complete brake failure. This is a catastrophic scenario that can result in accidents and injuries.
#3. Damage to Your Vehicle.
Continuing to drive with a faulty braking system can cause further damage to your vehicle’s components, leading to costly repairs.
How to Diagnose a Brake Light Warning?
A brake warning light can indicate different problems, from minor fixes to serious brake system failures.
Diagnosing the issue early helps ensure safety and prevents costly repairs.
Below are steps to identify the cause of a brake light warning.
#1. Checking for Simple Fixes First.
Before assuming a serious problem, start with simple checks.
- Ensure the parking brake is fully disengaged. Even a slightly engaged parking brake can trigger the warning light.
- Restart the vehicle to see if the warning resets. Some brake lights may remain on temporarily due to sensor errors but turn off after restarting.
A deeper inspection is needed if the light remains on after these steps.
#2. Inspecting the Brake Fluid Reservoir.
Brake fluid plays a crucial role in the braking system, and low levels can trigger the warning light.
- Locate the brake fluid reservoir under the hood, usually near the back of the engine bay.
- Check the fluid level against the reservoir’s markings. If the fluid level is below the minimum level, there may be a leak or worn brake components.
- If topping off the fluid, use the correct type recommended in the owner’s manual. However, if fluid levels drop again quickly, a professional inspection is necessary.
#3. Testing the Brake Pedal for Pressure Loss.
A brake pedal that feels soft, spongy, or slow to respond may indicate a serious issue.
- Press the brake pedal firmly and observe if it sinks too easily. This could signal a brake fluid leak or air in the brake lines.
- If the pedal requires pumping to build pressure, there may be a failing master cylinder.
- Any noticeable delay in braking response should be addressed immediately to prevent unsafe driving conditions.
#4. Looking for Signs of Wear on Brake Pads and Rotors.
Worn brake components can trigger warning lights and affect stopping power.
- Visually inspect the brake pads through the wheel spokes. Replacement is needed if they appear too thin (less than ¼ inch).
- Check the rotors for grooves, cracks, or discoloration, which indicate uneven wear or overheating.
- Listen for squeaking, grinding, or pulsating sensations when braking, as these are signs of worn pads or damaged rotors.
#5. Identifying Electrical or ABS System Issues.
Sometimes, the brake warning light is caused by electrical faults rather than mechanical problems.
- Check the fuse box for blown fuses related to the brake system. If a fuse is blown, replace it with the correct rating.
- Inspect wiring and connectors near the brake system for signs of corrosion or damage.
- If the ABS light is also on, the issue may involve a malfunctioning ABS module or sensor, which requires professional diagnosis.
Following these steps, drivers can determine if the brake warning light is a minor issue or requires professional attention.
Regular inspections and maintenance help prevent unexpected brake failures.
How to fix my brake warning light?
The best way to fix the brake warning light is to address the issues that caused the light to turn on at first. With proper inspections done, here is how to fix the brake light on the dashboard of any car.
#1. Start with the parking brake.
One common reason the brake light turns on is the activation of the parking brake. By disengaging it, the light should go off.
If the light doesn’t go off at a go, engage and disengage it a few times; the light should go after this. You may also need to adjust the parking brake lever if it’s loose.
#2. Top the brake fluid or fix leaky master cylinder.
If your brake fluid is low, try adding more fluid to it. Also, take this time to know why the fluid level is low.
While low brake fluid could result from using the fluid for a long while, it could also stem from a leak in the master cylinder, caliper brake pot, or any way in the brake line. Check to see if the master cylinder, brake pots, caliper, and the brake lines are in good shape.
Topping brake fluid in the leaky situation will bring you back to where you Started. Moreover, continuously driving with low fluid causes the brake system to lose pressure. Thus, leading to other damages and worst-case scenarios —brake failure.
A contaminated fluid may also trigger the brake light. Check the condition of your fluid and change it if needed. This leads to the question, what color is brake fluid? A healthy brake fluid has a clear yellowish look but turns brown, dark, or oily when contaminated.
#3. Inspect the antilocking brake.
The ABS utilizes several components that enable it to function effectively. Check to see if all components of the ABS are in good condition. The fastest way to spot ABS issues is by using an OBD II scanner.
This tool will reveal some fault codes that will tell you which ABS component to repair or replace. However, ABS issues are a bit tricky to fix, so you may need to visit an expert. Moreover, these professionals have the right tools to fix ABS issues.
#4. Replace bad brake pads.
Check the conditions of your brake pads. If they are worn, replace them as soon as possible. When pads get completely worn down, they eat into your rotors and damage them, invariably increasing repair costs.
#5. Adjust the stuck brake pedal.
Inspect the brake pedal. If they seem loose or stuck, adjust as needed. You may also need to replace it if it is bad. If you know you are not comfortable doing this, reach out to your mechanic.
#6. Replace burnt brake lights.
Check the brake lights at the back of your vehicle. If any bulb is broken or burnt, replace it immediately. The brake warning light on your dash should disappear after if this was the cause.
#7. Replace bad sensors.
Also, check that the brake fluid sensor attached to the master cylinder is working well. If it’s not, replacing it should help turn off the light.
If doing all the suggested above doesn’t help, take your car to an expert to make a proper diagnosis so the real culprit can be fished out. Moreover, if you are not confident doing any of these, please take your car to your mechanic to avoid more damage.
Is it OK to drive with brake light on?
While your vehicle will still function with the brake lights on, it’s not safe to drive in that condition. I have explained how to turn off the brake light on the dashboard, some of which are easy, and you can do it yourself.
It could be as simple as engaging and disengaging the parking brake or just shutting off the engine.
In other cases, it could be an issue with one or more brake components, which must be fixed if you want to reach your destination safely. So when you see the light, first stop the car, and engage and disengage the emergency brake.
If this doesn’t help, don’t drive the car anymore. Have the car towed to your garage and apply other methods explained above.
If, however, you’re not confident doing it, have your car towed to a mechanic or have them check the car. Driving with the light on not only puts other components in harm’s way but can also result in brake failure, endangering not just you but other road users.
FAQs.
Q: What does it mean if my brake light comes on while driving?
It usually means that either the brake fluid is lower than the sensor level in the fluid reservoir or there’s an ABS or sensor issue that’s occurred.
Q: Can I drive with the brake warning light on?
It’s not a good idea to drive with the brake light on. It could be an indication of a serious, safety-related issue.
Q: How do I check my brake fluid level?
The brake fluid should be between the MAX and MIN lines on the master cylinder reservoir. Top it up with clean fluid from a new container of the same type.
Q: Is a brake sensor failure a common cause of the brake light turning on?
Yes, it is. It could be worn brake pads, a speed sensor, or low brake fluid.
Q: Can a parking brake cause the brake light to stay on?
Yes, it can. Check that the parking brake isn’t engaged at all, lifting the pedal with your foot or hand while you pull the release.
Final words
The brake light on the dashboard is uniquely used to inform drivers of potential issues with the braking system.
Knowing what each brake light means is one step to knowing how to fix any braking issues. In many cases, when the brake lights pop on your dash, it’s either you forgot to disengage the parking brake or your brake fluid is low.
It could also be caused by worn pads, stuck pedals, burnt rear brake lights, and even failing sensors. Whatever the cause is, making a proper diagnosis and finding the issue will help prevent more damage and brake failure.