Skip the auto shop - Our mechanics make house calls

Q: I just replaced my brake master cylinder and the brakes still feel soft. What do I need to do after I replace the master cylinder

asked by on

I just replaced my brake master cylinder and my brakes still feel soft. what do I need to do now after replacing the master cylinder. also I have a check engine light on my dash now. I took it to be read and it states brake booster leak. what could that be?

My car has 240000 miles.
My car has an automatic transmission.

A: From what you've described you will hav...

From what you've described you will have to bleed your brakes. Also, I believe you may have a leak in one of the lines. You may want to use a wrench and tighten the lines a little more. If you're unable to fix this yourself, consider YourMechanic, as one of our mobile technicians can come to your home to bleed your brakes, diagnose the Check Engine Light, and help you make the appropriate repairs to your car.

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: The car starts up and turn off immediately

Hello. I would typically start by checking all of the sensors inputs with a scan tool to see if any are not reading correctly while starting. Most of the time, it is the air flow sensor or the crank sensor....

Q: Rt. Ft. rotor warped. Replaced it with new rotor and pads. Did not fix problem. could bearings be damaged?

Yes, depending on how bad the condition of the warped brake rotors and pads were before you changed them, they could have gotten hot enough to ruin the bearings and races which could cause the vibrating you are describing. You...

Q: Vehicle whining after belt replacement

Hi there. I would suspect another pulley that the serpentine belt drives has a dry/loose bearing. Have a certified mechanic, like ones from YourMechanic, inspect the noise and check each pulley for play.

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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.