Here's why this could happen and what to do:
Possible Causes:
* Power Brake System Failure: The most likely cause is a failure in the power brake system. The engine provides vacuum to assist braking, and if the vacuum fails, your brakes will become very difficult to apply.
* Vacuum Leak: There might be a leak in the vacuum lines connecting the engine to the power brake booster.
* Power Brake Booster Failure: The booster itself could be faulty, preventing it from providing the necessary assist.
* Hydraulic Brake System Failure: While less common, a failure in the hydraulic system that controls the brakes could also result in a loss of braking ability.
* Low Brake Fluid: A lack of brake fluid will prevent the system from working.
* Leaking Brake Lines: Leaking brake lines or calipers can result in fluid loss.
* Master Cylinder Failure: The master cylinder, which distributes brake fluid, can fail.
* Other Issues:
* Engine Malfunction: While less likely, a complete engine failure could be related to a component that also affects the brake system.
* Electrical Issue: A fault in the electrical system could interrupt power to the brake lights or the brake system itself.
What to Do Immediately:
1. Stay Calm: Panic won't help. Try to remain calm and focus on safe driving.
2. Assess the Situation: Is the engine completely dead? Is there any braking at all? How fast are you going?
3. Downshift: If possible, downshift into a lower gear to use engine braking.
4. Pump the Brakes: If you have any brakes at all, repeatedly pump the brake pedal to build up some hydraulic pressure.
5. Find a Safe Place to Stop: Look for a safe area to pull over, like a side street or a parking lot.
6. Warn Other Drivers: Use your hazard lights to alert other vehicles.
7. Call for Help: Contact a tow truck and a mechanic.
What to Do Next:
1. Don't Drive the Vehicle: Do not attempt to drive the vehicle until it has been inspected and repaired by a qualified mechanic.
2. Get it Diagnosed: A mechanic should diagnose the problem and determine the cause of the brake failure.
3. Get it Fixed: Repair the faulty components as soon as possible.
4. Check Brake Fluid Regularly: Make sure you have enough brake fluid and that there are no leaks.
5. Maintain Your Vehicle: Regular maintenance and inspections can help prevent this kind of dangerous situation.
This is a very dangerous situation, and you should not drive the vehicle until you have it checked by a mechanic. Be sure to prioritize safety and get professional help.
