What does it mean if it says check brake system?
It signals an issue in the braking system that needs professional attention and should not be ignored. If you notice changes in braking feel, or if other warning lights accompany it, stop safely and arrange service as soon as possible.
What does the warning mean?
The message is a general alert from your vehicle’s safety systems indicating a fault somewhere in the brakes, the hydraulic system, or related electronic controls such as ABS or ESC. Depending on the make and model, it can be triggered by a simple fluid-level issue, a sensor fault, or a more serious hydraulic or electrical problem. Because brakes are essential for safety, treat it as a priority warning.
Common causes
The following list outlines the most frequent reasons a brake warning might illuminate. These are not exhaustive, and a technician should diagnose the exact cause.
- Low brake fluid level or a leak in the brake hydraulic system
- Worn brake pads or contaminated brake fluid
- Faulty master cylinder, brake booster, or ABS pump
- Electrical issues such as faulty wheel speed sensors or a bad brake pedal switch
- Problems with the parking/emergency brake mechanism or its sensor
- ABS/ESP system faults or sensor wiring problems
These causes affect braking performance in different ways, from subtle changes in pedal feel to a complete loss of braking assist. A professional diagnosis is necessary to determine the exact fault and the required repair.
What should you do right now?
Follow these safety-focused steps to minimize risk until a technician can inspect the vehicle. Do not ignore the warning or drive aggressively if you feel abnormal braking.
- Safely pull over to a secure location as soon as it is safe to do so
- Check the brake pedal: does it feel soft, spongy, or sink toward the floor? If so, avoid driving the car
- Look for obvious signs of fluid leakage under the car or near the wheels
- If you can do so safely, check the brake fluid reservoir level and top up only with the correct type of brake fluid for your vehicle
- Limit driving and call for roadside assistance or a tow to a qualified shop
- Note any accompanying lights (ABS, traction control, or stability control) to share with the technician
These steps help you reduce risk and preserve safety until a professional can assess the system. Do not continue driving long distances with a brake warning active.
What will a mechanic check?
A trained technician will perform a diagnostic check and inspect key brake components to identify the fault and recommend repairs.
- Brake fluid level, leaks, and condition of the hydraulic lines
- Brake pads and rotors for wear or contamination
- Master cylinder and brake booster functionality
- ABS/ESC hardware and wheel speed sensors, plus related wiring
- Parking brake mechanism and related sensors
- Electrical system codes using an OBD-II scanner and, if needed, a system pressure test
Based on findings, the mechanic may suggest fluid replacement, pad/rotor service, leak repairs, sensor or pump replacements, or more extensive hydraulic system servicing. Prompt attention helps restore braking performance and safety.
Summary
A "Check Brake System" warning is a safety flag that something within the brakes, hydraulics, or electronic braking controls may be wrong. Causes range from a simple fluid issue to a failing ABS pump or sensor. Treat it as a priority; stop safely, avoid extended driving, and have the vehicle diagnosed and repaired by a qualified technician to ensure reliable braking performance.
What to do when my car says check brake system?
It's best to drive your vehicle as little as possible when the brake warning light comes on and contact a brake specialist to diagnose and repair the issue. If you can't drive the car to the repair shop, a mobile brake repair service can come to you to diagnose and repair the issue.
What does it mean when my car says brake system problem?
A "brake system problem" means there is a malfunction in your vehicle's braking components, such as low brake fluid, worn brake pads, a failing anti-lock brake (ABS) system, or an issue with the parking brake. This is a serious safety issue that requires immediate professional inspection and repair because it can lead to reduced braking performance or complete brake failure.
Common causes
- Low brake fluid: This can be caused by worn brake pads or a leak in the system. It is a common reason for the brake warning light to illuminate, according to Seat Cover Solutions and this article from Firestone Complete Auto Care.
- Worn brake pads or rotors: Excessively worn brake pads can cause a decrease in braking power and may be accompanied by squealing sounds or vibrations, as noted by SDT Brakes Europe and this article from CarParts.com.
- Anti-lock brake (ABS) system malfunction: A problem with the ABS computer or components can trigger the brake light.
- Parking brake engaged: On many vehicles, the parking brake warning light is integrated with the main brake system warning light. If the light remains on after the parking brake is fully released, there is another problem.
- Other component issues: Other potential problems include faulty brake calipers, air in the brake lines, or issues with the master cylinder.
What to do
- Reduce driving: If the warning light is on and you can confirm the parking brake is not engaged, you should drive as little as possible. Continuing to drive with a faulty brake system is dangerous and can lead to a complete failure.
- Consult a professional: Have the vehicle inspected by a qualified mechanic as soon as possible. Ignoring a brake warning light can compromise your safety and the safety of others, and can lead to more costly repairs.
Is it expensive to fix a brake system issue?
A complete brake repair that includes pads, rotors, and calipers typically averages between $200 and $800 depending on the vehicle and parts used.
Can I still drive with a brake warning light?
No, you should not drive with a brake warning light on, especially if it is red, as this indicates a critical problem with your braking system that makes it dangerous to drive. Safely pull over as soon as possible, and have the vehicle towed to a mechanic for inspection and repair.
This video explains the common brake warning lights on your dashboard and what they mean: 40sPowerStop BrakesYouTube · Sep 14, 2023
What to do immediately
- Find a safe place to pull over immediately.
- Turn on your hazard lights.
- Turn off the engine.
- Arrange for a tow truck to take your vehicle to a mechanic.
If the light is red
- A red brake light signifies a critical safety issue, so do not drive the vehicle at all.
- Common causes include low brake fluid, a leak in the braking system, or severely worn brake pads.
If the light is yellow
- A yellow or amber light may indicate a less critical issue, such as the parking brake being slightly engaged or low brake fluid.
- Check if the parking brake is fully disengaged. If not, release it and see if the light turns off.
- You may be able to drive to a mechanic, but have the vehicle diagnosed as soon as possible to avoid more serious damage.
This video demonstrates how to check the brake fluid level in your car: 24sDmitry SapkoYouTube · Aug 11, 2024
