Skip the auto shop - Our mechanics make house calls

Q: Brakes going out.

asked by on

The brake pedal is soft and goes to the floor. It seems like the brakes might be going out.

A: When your brake pedal goes to the floor you...

When your brake pedal goes to the floor you are experiencing a severe brake failure and you definitely need to take care of it right away. If you cannot build pressure in the brake system by pumping the brake pedal then you may have a failure in the brake master cylinder. It may also be a leak in the system. I would start by checking the brake fluid in the master cylinder. If it is very low then you may have a leak. To find the leak a technician would put the car on a rack and remove the wheels to inspect all of the braking parts for wetness indicating a leak. If there are no leaks then the seals inside of the master cylinder are probably bad. This is diagnosed by clamping off the brake lines to see if pressure still cannot be built. If it cannot then the master cylinder should be replaced. When replacing a master cylinder in this car it is very important that it is bench bled first and then the rest of the brakes must be bled after installation. To do this you should get the assistance of a certified mechanic, like one from YourMechanic, as they have the tools and the knowledge to find the problem and then repair it.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: I think I'm having minor problems. High RPMs, running hot, and delayed shifting

Hello. You appear to have a series of issues here. With the RPMs jumping like this, it is usually caused by a vacuum leak or a dirty throttle. Both of these will cause this to occur. The running hot...

Q: No brake lights. Bulbs are good and 3rd brake light works. Problem?

Hello there, thanks for writing in. It seems that faulty brake lights are a common problem with 2000 Pontiac Montanas. If the 3rd brake light works than the brake switch is working properly. The most common causes would be a...

Q: Clutch pedal going all the way to the floor

This sounds like a hydraulic issue. There is a leak in the clutch hydraulics. The leak could be the master cylinder, slave cylinder, or a line or hose. Follow the lines from the clutch master cylinder down to the transmission...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.