A leak in the brake system. Fluid has leaked out and air is now in your lines. This can be from a brake cylinder at wheel or in master cylinder, or even worse a rusted brake line. Check and repair it NOW.
manualy lift brake pedal to see if they go out. if so check spring at pedal
Something is impairing the brake pedal to go to the floor. Only a mechanic can tell you what is happening.
sounds like overheating of brake line, either from hot pavement, or cat converter. causes brake fluid to boil and loss of pedal.
test the booster with engine turned off, pump brake pedal until pedal goes hard then hold foot on brake pedal and start engine. if booster is working, the pedal will go soft as it should for mormal use. if booster is not working ,the pedal will stay hard
It wasnt assembled right
A brake fluid leak in the system would do that. Check the brake fluid reservoir. If it is empty you are in need of brake work asap!
Bad master cylinder or leaking line/caliper/cylinder
brake light switch, it is typically located above the brake pedal somewhere on the brake pedal arm
no you have a brake fluid leak somewere
usually they will leak out the back by the booster, your brake pedal will slowly go to the floor at stops or the brake pedal will go right to the floor when pushed.
When break lights do not turn off when the brake pedal is fully retracted suggests two possible causes: * The brake light switch is out of adjustment and needs to be adjusted. * The brake light switch is defective and needs to be replaced.
bad or out of adjustment brake switch on the brake pedal arm