Skip the auto shop - Our mechanics make house calls

Q: Sinking brake pedal in an O1 Lincoln Town Car

asked by on

I have an O1 Lincoln Town Car with a sinking brake pedal. I've changed the brake master cylinder but nothing changed. What can I do?

Of course, with the sinking brake pedal, you’d want to start with the most logical suspect - a brake fluid leak. Pull the tires off and see if anything’s leaking. Look for the dripping fluid. If you don’t find anything leaking, you can change your brake master cylinder.

Here’s another test you can do. Have the engine turned off and hit the brake pedal. If you hit the brake pedal and it is hard as a rock, and you start it up and it sinks, you need a new brake booster. If it’s not a bad brake booster, it could be the ABS system going down. They are super expensive so you want to pray that it’s not that going on. I recommend having the entire brake system checked by a professional so that they can pinpoint the fault. From there, they will be able to make any of the needed repairs to get your car back on the road.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Can brake problem cause engine problem? 2006 VW Jetta

Hi there - the brake booster on your Jetta uses an engine-driven vacuum pump - rather than vacuum from the engine intake system and a vacuum booster cylinder as many cars have historically used. It sounds like your mechanic is...

Q: What do you recommend for transmission fluid and engine oil for a 2010 Lincoln Town Car?

Hello. Ford or Motorcraft brand would be the OEM fluid brand that your vehicle came equipped with from the factory. However, any brand of oil and transmission fluid will work fine as long as it meets the API certification rating,...

Q: Wipers and blower motor will not shut off

This may be a result of a faulty blower motor relay. The blower motor relay supplies power to this motor when you turn the switch to "on" that can sometimes fail. When this happens, you may notice that you will...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...