Why Can't the Brake Pedal Be Pressed Down During One-Key Start?

[Elsa]

Here are the solutions for when the brake pedal can't be pressed down during one-key start: 1. First, it's important to understand that a car's braking system operates most effectively when the engine is running. The brake booster pump is the key component behind vehicle braking, amplifying the force applied to the pedal. When the engine is off, the brake booster pump stops functioning, and typically, pressing the brake pedal three times will deplete its stored energy. 2. If the brake pedal can't be pressed down, it's likely because the vacuum in the vacuum booster has been exhausted after pressing the pedal multiple times while the engine was off. Since the engine isn't running, the vacuum cannot be replenished. 3. If you encounter this issue, don't panic. Press the one-key start button to power on the vehicle, then apply more force to press the brake pedal—this usually unlocks it. Many car owners have experienced this situation. 4. If you haven't pressed the brake pedal unnecessarily after turning off the engine, the issue might lie with the brake pedal itself. In this case, it's advisable to visit a 4S shop for inspection and repair.