Skip the auto shop - Our mechanics make house calls

Q: Brake pedal goes all the way to the floor

asked by on

After I had the rear wheel cylinder replaced on the left rear wheel, the brake pedal still goes all the way to the floor

A: A sinking pedal is often a sign that there ...

A sinking pedal is often a sign that there is a leak somewhere in the brake's hydraulic system. Sometimes a problem of this nature may render a vehicle unsafe to drive, as braking systems relies on sealed pressure to operate. I would thoroughly inspect all 4 wheels, and underneath the vehicle for any obvious signs of leakage. If no obvious visual evidence is found, I would then suspect a problem with the master cylinder. Master cylinders usually fail due to internal sealing issues, so a thorough diagnosis of your braking issue by a mechanic would be recommended.

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: More cc or more number of cylinders

The 6.0 L engine means that all of the cylinders in the engine add up to 6.0L. If you have a V-8 then each cylinder is capable of .75 liters. In a V12 each cylinder is .5 liters each. The...

Q: Car sputters after 3000rpm and cuts out

You said that you changed the fuel filter and cleaned the tank, but did not say weather you had checked the fuel pressure. Checking the fuel pressure(s) is an important Diagnostic step on the old 240's with the K Jet...

Q: the power windows do not operate

Use a test light to check for power at the switches - especially the driver's door master switch. If none of the windows work from their individual switches either, you can have a bad master window switch. A common problem...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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.