Why does the brake warning light come on when stepping on the brake?

2 Answers
DeKatherine
07/28/25 9:50pm
The reasons for the brake warning light coming on are: 1. Insufficient brake fluid; 2. Brake pads worn to the limit; 3. Short circuit in the brake warning light circuit. The function of the brake is to reduce speed or stop the vehicle. Its working principle is to convert the kinetic energy of the vehicle into heat energy through friction between the brake pads and brake drum, as well as between the tires and the ground, thereby slowing down or stopping the vehicle. The maintenance methods for brakes include: 1. High-temperature protection to prevent corrosion of the brake system, avoid brake pads seizing due to high temperatures, and eliminate brake squealing; 2. Regularly replace brake fluid; 3. Clean the brake discs, brake drums, and any parts from oil stains, dirt, and friction dust to ensure good heat dissipation of the brake discs; 4. Regularly check the thickness of the brake pads or brake shoes.
Was this review help?
10
4
Share
SanDeclan
08/12/25 2:25am
A lit brake warning light is no small matter. I've encountered it several times, and each time it felt like an immediate fix was necessary. The main issues are various faults in the braking system: it could be that the brake fluid level is too low, with insufficient pressure due to low fluid; or the brake pads might be worn too thin, triggering an automatic sensor alert. There could also be a leak in the hydraulic system, such as a ruptured brake line. Additionally, sensors can sometimes malfunction, like getting wet or having poor electrical connections. The most severe issue is a failed brake master cylinder, which requires urgent repair. My advice is not to drive recklessly—first, find a safe place to stop and check the brake fluid reservoir level. If it's below the minimum line, top it up; if not, head straight to a repair shop. Continuing to drive risks brake failure, which is extremely dangerous. Regular maintenance, like periodic brake fluid and pad replacements, can save a lot of trouble. When this light comes on, it's essentially the system giving a warning—don’t delay, or repairs will become more expensive and unsafe.
Was this review help?
15
1
Share
Expand All
More Forum Discussions

How Many Questions Are There in Driving Test Subject 1?

There are 100 questions in the driving license test Subject 1. According to the "Regulations on the Application and Use of Motor Vehicle Driving Licenses," the questions are divided into single-choice and true/false questions, with each question worth 1 point, totaling 100 points. If 11 questions are answered incorrectly during the test, the system will automatically submit the test and end the exam. Subject 1, also known as the theoretical test or driver theory test, is part of the motor vehicle driving license assessment. The test content includes driving theory basics, road safety laws and regulations, local regulations, and related knowledge. The test is conducted on a computer, with a time limit of 45 minutes. Subject 1 test content: regulations on driving licenses and motor vehicle management; road traffic conditions and regulations; road traffic safety violations and penalties; regulations on road traffic accident handling; basic knowledge of motor vehicles; local regulations; knowledge of braking systems and safety devices for large and medium-sized passenger and freight vehicles; specialized knowledge for wheeled self-propelled machinery, trams, and trolleybuses. Subject 1 test precautions: During the test, candidates should pay attention to their attire—no slippers are allowed, and electronic devices and bags are prohibited in the examination room. Bring your ID card and queue to enter the waiting hall. Observe the precautions and procedures on the large screen, and store personal belongings in a locker before entering the examination room. Upon entering, verify your identity at the assigned seat and begin the test. Ensure the camera is aligned with you and adhere to test discipline. If you fail the first time, there is a retake opportunity on the same day. If you fail again, you must pay and reschedule. After the test, queue to collect your score sheet and sign it—unsigned sheets are considered invalid. There is no limit to the number of times you can reschedule Subject 1. Each subject can be taken once, with one retake opportunity if you fail. If you do not take the retake or fail it, the test ends, and you must reschedule. For Subject 2 and Subject 3, there are only five test attempts, and rescheduling must be done at least ten days later. If you fail the Subject 3 safe driving knowledge test, the previously passed road driving skills test results remain valid. Steps to schedule Subject 1 online: Open the Comprehensive Traffic Safety Service Management Platform and select your province/city. Choose "Exam Scheduling." Click "Register Now." Fill in user information: Enter your ID number and the phone number used during registration, as shown: Select user type: Choose "First-time applicant for a motor vehicle driving license." Enter the SMS verification code, as shown: Read and agree to the terms, then click "Next." Confirm the information is correct and click "Next," as shown: Exam scheduling: Select the subject, test venue, and scheduling period, enter the image verification code, and click "Next," as shown: Choose the date and session: The system offers two scheduling modes—self-selecting test sessions or allowing the system to arrange them, as shown: If you choose the self-selection mode, you can select one or multiple sessions. If you choose the system-arranged mode, the system will automatically match available sessions within your selected period. After selection, click "Next" to confirm. Confirm the submission and review the information again. If correct, click "Complete." Upon successful submission, the system generates a transaction number. The test schedule will be arranged and announced on the result announcement date. There are three driving test subjects: Subject 1, Subject 2, and Subject 3. Subject 1 refers to the road traffic safety laws, regulations, and knowledge test; Subject 2 refers to the field driving skills test; Subject 3 consists of two parts—road driving skills and safe driving knowledge. The safe driving knowledge test is conducted after Subject 3, so it is commonly referred to as Subject 4. However, the official term (Ministry of Public Security Order No. 123) does not include "Subject 4."
13
2
Share

What is the Cayenne?

The Cayenne, known as 'Kayan' in Chinese, is a mid-to-large-sized SUV under the Porsche brand. The Cayenne is available in two variants: two-wheel drive and four-wheel drive. The four-wheel-drive version features a front-engine, four-wheel-drive layout with full-time four-wheel drive and a multi-plate clutch central differential. The dimensions of the Cayenne are 4931mm in length, 1983mm in width, and 1676mm in height, with a wheelbase of 2895mm. The Cayenne made its debut at the Geneva Motor Show in March 2002. The Cayenne family has since introduced several models, including the Cayenne S, Cayenne S Hybrid, Cayenne Turbo, and Cayenne V6. The Cayenne's strongest selling point is its heritage as part of the Porsche supercar brand, which emphasizes high performance, safety, and the pure driving dynamics of a sports car. Exterior: The Porsche Cayenne boasts a stylish and dynamic appearance, with a streamlined body that retains its futuristic design philosophy. Interior: The Cayenne's interior is finely crafted, well-equipped, and offers comfortable seating. Features like heated steering wheels and armrests next to the seats enhance usability, while optional extras like panoramic sunroofs and compasses cater to consumers seeking a personalized touch. Space: The Cayenne provides a relatively spacious interior with numerous practical storage compartments. However, its trunk space is slightly smaller compared to other vehicles in its class. The Cayenne comes with a comprehensive suite of active and passive safety features, including knee airbags, night vision systems, hill descent control, hill start assist, auto hold, front parking sensors, LED daytime running lights, tire pressure monitoring, rear parking sensors, brake assist (BA/EBA/BAS), anti-lock braking system (ABS), heads-up display (HUD), heated steering wheel, lane keeping assist (LKAS), engine start-stop, electronic stability control (ESP/DSC/VSC), traction control (ASR/TCS/TRC), side curtain airbags, electronic brakeforce distribution (EBD/CBC), and child seat anchors.
5
0
Share

How long does it take to retrieve the vehicle after it is impounded due to an accident?

You can retrieve the vehicle within a maximum of 60 days after it is impounded. Below is an introduction to major accident vehicles and accident vehicles: Major accident vehicle: Major accident vehicles may have deformations in areas such as the roof rails, rocker panels, rear quarter panels, trunk, and body frame. There might even be severe body repair work, including cutting, splicing, or welding. The engine and transmission of major accident vehicles usually undergo major repairs, and in more severe cases, the entire powertrain may be replaced. Accident vehicle: Accident vehicles generally sustain minor damage, typically limited to the exterior panels, with no significant issues to the vehicle's structure.
8
1
Share

What causes the creaking sound when turning the steering wheel?

Possible causes of steering wheel noise are as follows: 1. Friction between plastic components: Since steering wheels are typically made of plastic parts, they may harden in cold temperatures, potentially causing friction sounds. 2. Noise originating from inside the steering wheel: If the noise comes from within the steering wheel, it's most likely due to the clock spring (airbag spiral cable). Try removing the steering wheel and applying some grease to the clock spring. If the noise persists, the clock spring may need replacement as it could be damaged. Note: Handle the steering wheel removal gently, or disconnect the airbag fuse first to prevent accidental airbag deployment.
8
2
Share

What is another name for the handbrake lever?

Handbrake is also called the parking brake lever. Below are the detailed introductions: Introduction: The parking brake lever is a control device that fixes the vehicle body on the ground or a certain plane without relative movement, and it is part of the vehicle parking brake assembly. Brake system: The brake system consists of the control system, hydraulic system, and power assist system. The control system includes the pedal, handbrake, etc. The hydraulic system consists of hydraulic oil, brake pump, and hydraulic pipes. The power assist system is the vacuum booster pump. The electronic control system includes the ABS pump, ABS sensor, and ABS computer. The execution system consists of the brake caliper, brake pads, and brake disc.
7
4
Share

Can the AWD system be manually switched?

AWD systems generally cannot be manually switched. Here are the details: Reason: The system automatically switches to AWD mode only when the onboard computer detects wheel slippage, otherwise it remains in two-wheel drive most of the time. AWD is commonly used in urban SUVs, which don't require high off-road capabilities, hence the more economical and practical AWD system is equipped. Introduction: AWD only switches to four-wheel drive when necessary, otherwise remaining in two-wheel drive. The system automatically switches between two-wheel drive and four-wheel drive based on road conditions without requiring manual operation.
5
0
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.