Presence of air in brake lines.
Car brake pedal goes to the floor.
When you are ready to leave for work after your car has sat for a prolonged period of time check the ground underneath your car for puddles.
The brake pedal goes to floor mainly because when it is depressed the mushy and the spongy brake pedal can be forced to the ground for a heavy down pressure when applied to it.
This happens because you are not getting the sufficient power boost required to stop the car.
Many drivers have reported that the brake pedal goes to the floor after the new master cylinder replacement.
Axle bearings hold the brake rotor true without play while they both rotate.
It s either the brake fluid is very low or the brake shoe is worn out.
This is pretty easy to diagnose.
After checking for all the other more common culprits check for any loose axle bearing and replace if needed.
If your brake has been working just fine but you the brake pedal goes to floor after turning sharp corners try pumping the brake pedal twice or more for it to return to its usual state.
Sometimes the depressed brake pedal can cause much damage to your car if you don t give it a proper look and take care of it right on time.
1 leak from brake line or brake caliper.
The most common reason this happens is because you have a leak in one of your lines.
Another common reason why your brake pedal may go down to the floor is because you are running low on brake fluid.
One of the more common causes for the brake pedal going to the floor is a loss of brake fluid.
When the brake pedal is press and you notice that it goes to floor or the car seems longer to stop there are two possible reasons that causing this kind of problem.
Technically there are two main causes that would make the brake pedal sink all the way to the floor.
If your brake pedal sinks towards the floor when you are stopped while your foot is on the brake or does not feel as firm when the brakes are applied this could indicate you are having some sort of trouble with your brakes.
Then again this is giving you a modest benefit of the doubt which you don t deserve.
The final reason for a brake pedal to go to the floor is failing axle bearing.
You are assuming that if the pedal goes to the floor that the car is not slowing as fast as it could.
The pedal goes all the way to the floor to stop the car completely.
If this bearing goes bad it will allow the brake rotor to move back and fourth which pushes the caliper piston back into the caliper creating an air gap.
When you re out of brake fluid your brakes simply won t work.
A brake pedal going to the floor means nothing if the car is achieving maximum braking.
Another possible cause is a bad brake master cylinder.
A brake pedal that feels mushy spongy or that slowly sinks to the floor when depressed can be best described as brake pedal sink.