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What are the reasons for the car not starting and displaying a brake failure?

2 Answers

ElianaDella

07/24/25 5:40am

The reasons for the car not starting and displaying a brake failure are: 1. Insufficient brake oil pressure; 2. Air in the brake system; 3. Excessive free travel of the brake pedal or excessive brake clearance, poor contact of the brake shoe friction plate, severe wear or oil contamination; 4. Wear or scoring of the brake master cylinder, wheel cylinder pistons and cylinder tubes, aging or damage of the rubber cups. Solutions for the car not starting and displaying a brake failure include: 1. If the handbrake malfunctions, check whether the brake oil is insufficient. If the brake oil is insufficient, it is necessary to check whether it is caused by leakage; 2. Check the wear degree of the brake pads. If the brake pads are severely worn, the car will also display a brake light failure; 3. To maintain the vehicle and ensure safety, regular maintenance of the brake system should be performed, including reasonable replacement of brake pads and periodic replacement of brake oil.

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RyderAnn

08/11/25 1:18am

When my car won't start, it shows the brake fault light, which is quite common, especially in some vehicles equipped with smart start systems. The reason could be a faulty or poorly connected brake switch, as most cars nowadays require you to press the brake pedal to start the ignition. If the brake system sensor detects an abnormality, such as low brake fluid level or a problem with the ABS module, it may falsely report a fault signal, preventing the engine from starting. Additionally, aging or short-circuited electrical wiring can also trigger these warnings. From similar experiences, I've learned that you can first try pressing the brake pedal a few times to check if the brake lights come on. If they don't, it's likely a switch issue, and taking it to a professional repair shop for diagnosis with specialized tools would save time and ensure safety. Ignoring such faults for a long time may affect driving safety, so it's recommended to regularly maintain the vehicle's electrical system.

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