Why Can't the Brake Be Pressed and the Car Won't Start?
2 Answers
If the car won't start, it means the engine cannot be ignited, which causes the brake pedal to be unpressable. Another possible reason could be a leak in the vehicle's brake booster pump or a malfunction in its components. How the Braking System Works: The automotive braking system is a hydraulic system. To ensure the brake pads press firmly against the brake discs, a significant amount of force is required. This force is difficult to achieve solely through human effort (foot pressure), and drivers with insufficient strength may find it impossible to press. Therefore, the car's braking system includes a "vacuum booster" system. Simply put, it uses the engine's power (the vacuum suction from the intake system when the engine is running) to assist the movement of the brake pedal, making it easier for the driver to press the brake. Sometimes, when the car is not started, you can press the brake a few times due to the remaining vacuum boost from earlier, but after a few presses, it usually runs out. Solutions for the Issue: If the driver presses the brake multiple times and it still doesn't return to normal, they should find a nearby repair shop to have the issue resolved before continuing to drive.
I often encountered similar issues when repairing cars, such as the brakes being hard to press and the engine failing to start. The main thing to check is the battery condition. If the battery is low on charge or aged, the engine won't start, and consequently, no vacuum can be generated to power the brake booster, resulting in a stiff brake pedal. In most cases I've handled, it was due to the owner forgetting to turn off the headlights, which drained the battery. The solution is simple: jump-start the engine using another vehicle. Once the engine starts, the vacuum booster will operate as the engine runs, and the brakes will return to normal. Preventive measures include regularly checking the battery's lifespan. It's recommended to test the voltage every six months and replace an aging battery promptly. Safety first—if you encounter this issue late at night, pull over immediately and use your phone to seek professional assistance. Don't try to force it yourself, as it can easily lead to accidents.
