You may have worn shoes or pads depending on what your vehicle has. Also check the fluid level in your brake master cylinder.
Low brake fluid level or Parking brake not released completely
a low brake pedal indicates worn brake pads and shoes.have then replaced
it may indicate that the brake fluid is low
Normally it means the brake master cylinder is low of fluid. But it can indicate another problem.
Is the brake fluid level LOW in the brake master cylinder in your engine compartment ? If the brake fluid level is LOW that will turn the brake light on in your dash
Normally it means the master cylinder is low of brake fluid which also means your brake pads are worn out or you have a leak.
My 1992 Honda Accord Brake Lamp came on several times after I had the Master Cylinder replaced. Turns out the fluid had gotten low. Once I refilled the fluid level, the light stopped coming on.
If you replace any brake component that breaks the brake fluid seal or you let it get very low of brake fluid, yes, you must bleed the brakes.
Its becaue the slave cylinder is has a leak, and pressure is lost when you press on the brakes.
Low brake fluid in master cylinder, fault in brake fluid level sensor, parking brake is on, parking brake sensor fault.
This issue could mean that the fuse on the indicator light is blown. This could also mean that the brake fluid is low on the vehicle.
Look at the master cylinder on the driver's side next to the firewall. Only add fluid if it is at the add or low mark. Only add the exact fluid as listed on the cap. If it is low, you either have a leak or your brake pads are worn.