Why does the handbrake light stay on after locking the car?

[Sanders]

The reasons for the handbrake light staying on include the handbrake not being fully released or insufficient brake fluid. The details are as follows: Handbrake not fully released: The handbrake is not truly in the released position; Insufficient brake fluid: Lack of brake fluid, with the fluid level below the safety line; Brake pulling to one side: If the handbrake light is on and accompanied by the car pulling to one side when braking, it may be due to uneven brake pad wear or uneven force distribution in the brake calipers. This situation requires immediate inspection and repair, as it can compromise driving safety. The handbrake, also known as the parking brake, functions to provide resistance when parking to prevent the car from rolling, whether it's a manual handbrake or the parking gear in an automatic transmission, which locks the drive shaft or rear wheels.