What Causes the Electronic Brake Warning Light to Stay On?
2 Answers
Here are the specific reasons why the electronic brake warning light stays on: 1. Parking brake not released: If the parking brake is not released or not fully released, it will cause the indicator light to stay on, reminding the driver to release the parking brake before starting. 2. Insufficient brake fluid: Low brake fluid can affect the car's braking performance and driving safety. If the brake fluid was recently topped up but the car still shows insufficient brake fluid, check the brake master cylinder and brake lines for leaks. 3. Brake system air leakage: If you feel weak braking or insufficient braking force when pressing the brake pedal, it indicates air in the brake system. Check the vacuum booster pump for air leaks. 4. Worn brake pads: Severely worn brake pads can reduce braking performance and may cause the car to completely lose braking function.
The electronic parking brake warning light on my car kept staying on that day, which was really annoying. I've encountered this several times, and the most common cause is a faulty sensor in the braking system - either dirty or with loose wiring. Unlike old-fashioned mechanical brakes, electronic brakes are more susceptible to environmental factors, like when sensors get short-circuited after driving through water. Additionally, insufficient brake fluid can trigger the warning too, as the system detects abnormal pressure. I've tried checking it myself - first seeing if other dashboard lights are on. If it's just this one light, it's probably a sensor issue. But I never take it lightly - if left unfixed, the car might roll when parked on slopes, which is dangerous. So I always take it to the repair shop immediately for diagnosis. They also warned me that low winter temperatures can make electronic modules respond sluggishly - a minor flaw in modern cars. Remember, never tamper with the circuitry yourself; it's safer and more reassuring to spend the money on professional service.
