What to Do When the Brake Pedal Can't Be Depressed and the One-Button Start Fails?
2 Answers
Reasons why the brake pedal can't be depressed: 1. The car's braking system works best when the engine is running: the brake booster is the key component behind vehicle braking. 2. When the engine is off: the brake booster stops working, and pressing the brake pedal three times will deplete its energy. 3. The brake pedal can't be depressed if it was pressed multiple times while the engine was off. Solutions are as follows: 1. Press the one-button start to power on the system: then press the brake pedal firmly, which usually unlocks it. 2. Visit a 4S shop for inspection: If the brake pedal was not pressed unnecessarily after the engine was turned off, there might be an issue with the brake pedal, requiring a visit to a 4S shop for inspection.
I've encountered this situation several times. When the brake pedal can't be depressed, it's usually because the engine isn't running, causing the vacuum booster system to fail and making the pedal extremely stiff. In the cars I've driven with push-button start, stepping on the brake is required as a safety signal - if you can't press it, the start button won't respond. Don't panic yet. Try pressing the brake pedal firmly multiple times, especially when parked. Sometimes this can temporarily build up enough pressure to help with starting. If that doesn't work, check if the battery voltage is normal; low battery power can also affect the booster system's operation. There might be obstructions near the engine or air leaks - these are all potential causes. Never force-start the car as this could damage more components. For safety, immediately stop in a safe location, lock the car with the mechanical key, then call for professional towing or take it to a repair shop to inspect the brake pump and fluid system. Regular maintenance can prevent such issues.
