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 October 13, 2016

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.

Brake fluid is leaking Inspection $79.99 - $89.99 Get a Quote
Bleed Brakes $97.95 - $113.94 Get a Quote
Check Engine Light is on Inspection $79.99 - $89.99 Get a Quote

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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

What others are asking

Car died while driving and won't start again 2006 Chevrolet Aveo

Hi there - your symptoms suggest a fuel supply issue. Check fuses and the relay for the fuel pump first, and listen when going through the start sequence to hear the fuel pump run, for at least a couple of...

low gas mileage, bad exhaust smell

Dependin where the exhaust leak is can cause the O2 sensors to not get correct amount of gases in the exhaust and cause the rich running condition. I would suggest having the computer codes pinpoint tests be done to see...

My radiator fan is running very slowly, any advice you can give me to fix this issue?

You are correct. The fan motor has too much resistance and will not allow the full amount of current into the motor from the battery. I recommend replacing the fan motor. Also, check the voltage on the harness to the...

El Cadillac SRX 2011 have fuel filter a lokin but not found tanks

The fuel filter is located up next to the fuel tank. You will need the vehicle up on a lift to see it and replace it.

Code P2A00,, sensor was replaced, eng.light back.This was after 2x replacing. Relearn MAF done, and:vibration at stop after drive

The code P2a00 can be caused by a few different causes. The O2 sensor or wiring, exhaust gasket leak, clogged injectors or a catalyst problem. Have all these items checked and replace or repair as needed. If you need assistance...

Will the check engine light cut off automatic

In some rare instances your check engine light may disappear by unhooking the battery, however this is not recommended since doing this may be avoiding a potentially more serious problem temporarily by clearing the code this way. If there is...

Egr valve insufficient flow

Insufficient EGR flow is probably not the cause of the rough or low idle and thus is just a coincidental fault. You should repair it and perhaps first, just to be absolutely sure, but rough idle is more likely due...

What would cause my transmission to not shift

One cause to rule out is low fluid level or a plugged transmission fluid filter. Delayed shifts can also be caused by internal hydraulic leaks in the valve body or failing internal transmission seals found on clutch pack pistons and...

Locked brakes - 2004 Cadillac CTS

Hi there. From the description you have provided, your vehicle's left front and right rear caliper locking would have been a combination/proportioning valve before ABS (anti-lock brake system). The EBCM (electronic brake control module) controls the valves in the hydraulic...

Related articles

P0714 OBD-II Trouble Code: Transmission Fluid Temperature Sensor Circuit Intermittent
P0714 code means there is an abnormal transmission temperature often due too low transmission fluid and faulty parts.
Tips on Braking for New Drivers
New New drivers have to spend some serious time behind the wheel before they are ready to go out on their own and drive on busy roads. Situational awareness is tricky to maintain with so much happening around the vehicle,...
P0456 OBD-II Trouble Code: Evaporative Emissions System Small Leak Detected
P0456 code definition Evaporative Emissions System Small Leak Detected What the P0456 code means P0456 is an OBD-II generic code that the...