The most common cause of a brake pedal being locked and a car not starting is that the parking brake has been left engaged. This means that the brake pads are still pressing against the rotors, preventing them from spinning when you try to start your car. Additionally, if your vehicle has an automatic transmission, it may be stuck in park due to a faulty shift interlock solenoid or switch which prevents the shifter from moving out of park unless the brakes are applied.
Another possible cause is air in the braking system, which can prevent proper pressure from reaching the brakes and locking them into place while also preventing you from starting your engine until this issue is resolved.
Knowing why is my Brake Pedal Locked and car won’t start is crucial to stay safe during the drive. In this blog post, we will explore the reasons why the brake pedal is locked and the car not starting.

Why is My Brake Pedal Locked And Car Won’t Start: Find the Reasons
If your brake pedal is locked and your car won’t start, there could be several potential reasons for this issue. Here are some common explanations to consider:
1. Shift Interlock System: Many modern vehicles have a shift interlock system that requires the brake pedal to be depressed before the vehicle can be shifted out of “Park” and started. If there’s an issue with this system, such as a malfunctioning shift interlock solenoid or a faulty brake switch, the brake pedal might become locked, preventing the car from starting.
2. Dead Battery: A dead or weak battery can cause various electrical systems in the car to malfunction, including the interlock system that requires the brake pedal to be pressed before starting. If the battery voltage is too low, it might not provide enough power to release the brake interlock.
3. Faulty Brake Switch: The brake switch is responsible for sending a signal to the vehicle’s computer when the brake pedal is depressed. If the brake switch is malfunctioning, the computer might not receive the signal, preventing the car from starting.
4. Ignition Switch Issue: A faulty ignition switch can prevent the car from recognizing that the brake pedal is depressed, thus locking the brake pedal and not allowing the car to start.
5. Transmission Issue: Problems with the transmission linkage or the transmission itself can sometimes prevent the vehicle from recognizing that it’s in the “Park” position, which in turn might prevent the car from starting.
6. Anti-Theft System: Some vehicles have security systems that can lock out the ignition if they detect a potential theft or unauthorized access. If there’s an issue with the anti-theft system, it might prevent the car from starting.
7. Hydraulic Brake System Issue: In some cases, a problem with the hydraulic brake system, such as a brake fluid leak or air in the brake lines, can affect the functionality of the brake pedal and the vehicle’s starting process.
8. Faulty Starter: While the brake pedal being locked might not be directly related to a faulty starter, a malfunctioning starter can prevent the engine from cranking and starting.
9. Electronic Control Module (ECM) Issue: The ECM, which controls various functions of the vehicle, including starting and shifting, could have a malfunction that’s preventing the car from starting.
10. Mechanical Issue: There could be a mechanical issue within the brake pedal assembly or the linkage that’s preventing proper engagement of the brake pedal and its associated systems.
Given the complexity of modern vehicles and the potential safety implications, it’s advisable to have a professional mechanic diagnose and repair the issue. They have the expertise and equipment needed to accurately identify the root cause of the problem and perform the necessary repairs to get your car running again.
My Brake Pedal is Stiff And Car Won’t Start Jeep
If you are having trouble starting your Jeep and the brake pedal is stiff, it could be due to a failing ignition switch. This part sends an electrical signal from the key in your vehicle’s ignition to its starter motor, and if it goes bad, the car won’t start.
You may also need to check your battery and connections for any corrosion or loose wires, as these can also cause problems with starting a vehicle.

My Brake Pedal is Stiff And Car Won’t Start Nissan
If you have a Nissan and your brake pedal is stiff and the car won’t start, it could be caused by an issue with the power steering pump. The power steering pump puts pressure on the brakes to engage when starting, so if there’s a problem with it, the brake can become stuck in place.
If this happens, you may need to take your car into a mechanic for repairs or replacement of parts.
My Brake Pedal is Stiff And Car Won’t Start Ford
If you are experiencing a stiff brake pedal and your Ford car won’t start, it is possible that there could be an issue with the brake booster. The purpose of the brake booster is to provide additional pressure to the brakes when they are applied in order to reduce strain on the driver’s leg muscles. If this part has failed, then it can cause a stiff pedal as well as preventing your car from starting.
It is important to have this looked at by an experienced mechanic as soon as possible so that any necessary repairs or replacements can be done before more serious damage occurs.

My Brake Pedal is Stiff And Car Won’t Start Volkswagen
If you have a Volkswagen and your brake pedal is stiff and the car won’t start, it could be an indication of a faulty brake switch. This component is responsible for sending signals to the starter relay that allow the engine to turn over. If it has malfunctioned, then it will not provide this signal, causing your car not to start.
To determine if this is indeed the issue, you should take your vehicle in for service with a qualified technician who can diagnose and repair any issues with this component.
My Brake Pedal is Stiff And Car Won’t Start Honda
If you have a Honda and your brake pedal is stiff and the car won’t start, it could be caused by an issue with your brakes or transmission. If the car will not shift into gear, then there might be a problem with your clutch assembly or transmission components.
It’s best to take your vehicle to a licensed mechanic so they can diagnose the underlying cause of the problem and recommend repairs as necessary.
My Brake Pedal is Stiff And Car Won’t Start Jeep Compass
If you find that the brake pedal on your Jeep Compass is stiff and the car won’t start, this could be a sign of an issue with either the brake system or another part of the car. It’s important to have any issues checked out by a professional as soon as possible, to ensure that everything is functioning properly and safely.
If it turns out to be a problem with your brakes, they may need to be replaced or adjusted in order for them to work correctly again.

My Brake Pedal is Stiff And Car Won’t Start Dodge Challenger
If you have a Dodge Challenger and your brake pedal is stiff and the car won’t start, this could be caused by an issue with the vacuum booster. If there’s not enough power from the engine to activate it, then it can cause issues with starting the vehicle as well as a stiff brake pedal.
You should take your car in to be inspected by a qualified mechanic who can diagnose any underlying problems causing this issue.
My Brake Pedal is Stiff And Car Won’t Start BMW
If your BMW’s brake pedal has become stiff and the car won’t start, it could be caused by a failed brake switch or malfunctioning vacuum pump. The brake switch is responsible for activating the starter when you press down on the brakes. When this component fails, it can prevent your engine from starting.
Additionally, if there is an issue with your vehicle’s vacuum pump, then it may not have enough pressure to activate the brakes properly which also leads to a stiffer-than-normal feeling in the pedal and difficulty starting.
What Do I Do If My Brake Pedal Is Locked?
If your brake pedal is locked, there are a few steps you can take to resolve the issue:
- Check your parking brake. Make sure the lever is released and that it has not been partially engaged.
- Look for any visible obstructions like debris or ice build up around the brakes. Remove any blockages if present.
- If necessary, consult a professional mechanic for further inspection and repair of the braking system.
It is important to address this issue as soon as possible, so take action right away to prevent any potential damages or accidents due to faulty brakes.

Can Dead Battery Cause Brakes to Lock Up?
No, a dead battery will not cause brakes to lock up. Brakes can be locked up if:
- The brake fluid has become contaminated or is low.
- The brake rotor has warped.
- There’s air in the brake lines.
- A caliper is stuck or malfunctioning.
All of these issues are unrelated to the battery and must be addressed separately by a qualified mechanic.
Brake Pedal Stiff Car Won’t Start Dodge Charger? Reasons and Quick Fix
Conclusion
In conclusion, a locked brake pedal can be an indication of several underlying issues. It’s important to diagnose the issue properly and make sure all parts are working efficiently before taking your car out on the road.
If you’re still unable to get your car to start, it may be time to consult with a professional mechanic for further assistance.