Brake Pedal Failure Causes, Symptoms, and Solutions

A lack of hydraulic pressure in the braking system is the most common cause, as well as worn brake components that require more brake pedal travel to apply ... The reason is that the part of the master cylinder that does not normally pass through the seals gets corroded. If you push the pedal further, ... You either have a leak (which wouldn't result in a full reservoir), air in the lines, or more than likely a bad Master cylinder. I'd put my ... A brake pedal going to the floor may indicate an external brake fluid leak, master cylinder problem, ABS hydraulic unit problem, or other brake ... Only go out if necessary. Even if you can drive well in bad ... floor and use the ball of your foot to apply firm, steady pressure on the brake pedal. Causes of a Brake Pedal That Goes to the Floor. The loss of hydraulic pressure from a fault in the master cylinder or the brake lines is the ... This could indicate an unevenly worn rotor, dirty brake fluid or contamination of the fluid by moisture. You can solve such a problem with a relatively ... Pedal goes to the floor (or close to the floor) for only a few reasons. ... Or there is an external fluid leak. If the pdeal is not hard, there is ... Most common causes are leaking brake line or brake cylinder. Have someone press the brakes while you look under the truck for leaks. No leaks? The pedal going down SOME when starting the engine with a power brake booster is normal, but the booster is making the air-in-the-system problem worse.