Skip the auto shop - Our mechanics make house calls

Q: The brakes are spongy while the car is running but the pedal is normal when it's off

asked by on

My mom was coming over a bump the other day and when she got to the top she hit her brakes and they went out she could still use them but she would have to crush them always down the master cylinder was replaced and bled where's new brake fluid and now it gets hard when it's off but when you start it new releases it becomes spongy again the rotors are a little worn but I'm not sure if that could affect it

My car has 145000 miles.
My car has an automatic transmission.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: My car still overheats, I replaced water pump and thermostat, and now after water pump install it knocks bad

Hi there: Trying to diagnose an overheating issue remotely is incredibly difficult. However, there are three things you can do to attempt to solve this issue. First, remove the water pump, verify it's the right replacement part and reinstall with...

Q: How do I install the spare tire?

Drive your car long enough and you’ll experience it – having a flat tire. It’s no fun at all, but the spare tire will let you get back on the road (and to get your flat repaired or replaced). Of...

Q: Difficulty shifting out of park. 2005 Lincoln Zephyr

Hi there. This issue can be caused by a misadjusted brake light safety switch, or a misadjusted (or failing) shiftlock interlock switch. Both of these are safety mechanisms which require the brake pedal to be pressed firmly before moving the...

Related articles

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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.