Hello,
There are few reasons why the pedal can go to the floor. One is when there is air trapped in the brake lines. Another common one is having a faulty master cylinder and it is just not able to create pressure as you press the pedal.
https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor
Make sure there are no leaks in the brake system. Check each caliper and all the hoses.
Bleeding the brake could be a good first step.
https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system
If the issue exists after the brake bleeding and there are no leaks, then it is likely a bad master cylinder and needs to be replaced.
https://www.2carpros.com/articles/how-to-replace-a-brake-master-cylinder
I have attached diagrams for your reference.
Please let me know if you have any questions.
Thank you.
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Thursday, October 21st, 2021 AT 1:03 PM