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: Air not working

Hello. There are many components involved in the air conditioning system, and many possible points of failure. If no air is coming from the vent, you can consider the interior fan and its circuits. Cool or warm air when the...

Q: Q: What precautions should be followed when driving?

It’s vital that you are able to drive without distractions, without objects rolling around in the cabin, and without anything impeding your control of the car. Here are the most important precautions to follow when driving: Don’t adjust the...

Q: Tail pipe sucks in at times, sucks in a dollar bill

If you have an engine that is running rough and misfiring and the exhaust is sucking in sometimes then you may have an exhaust valve that is sticking open. You should have a compression test to the motor. The valves...

Related articles

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...
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...