Q: brake sinking but still work.

asked by on

please bare with me since my English is not quite good. when car is off brake is really firm. but when starting to drive brake lose pressure but only sometime. also lose pressure when at a hill. but will stop the truck before the brake pedal hit the floor. little bit dangerous cause it work perfect sometime and other time the brake pedal will sink and surprise me

My car has 180000 miles.
My car has a manual transmission.

Hello there, a few different faults can cause the vehicle to have poor brake performance like this. The most common causes would be the brake booster, brake master cylinder, or a brake fluid leak.

When a truck has this sort of braking issue it is recommended to not drive the vehicle, as it is unsafe until the problem is resolved. A qualified technician will be able to diagnose your brake system if you’d like to get this fixed. Once this is done, an accurate repair can then be made.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. brake sinking but still work.

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 will not start. The lights come on however it will not turn over. When I have the battery charge it starts and will run

Hello, and thank you for writing in. The battery is likely going bad. There are a lot of presetting and memory that the vehicle must store when the car is off, and this pulls a small amount of electrical power....

Q: Q: Starter removal

Hello. I would need to know which engine that you have in your truck to know the correct removal process for the changing of this starter. If the engine is not cranking, then it may indeed be the starter, as...

Q: Starter clicks

Hello. The symptoms you describe are typical of a faulty starter or starter solenoid. If the starter motor or solenoid wear out internally they may no longer be able to start the engine properly. A common trick is to tap...

Related articles

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...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...