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Why does the handbrake P light keep flashing?

1 Answers

OAlexander

08/29/25 3:36am

Handbrake P light keeps flashing due to insufficient brake fluid. Brake fluid replacement interval: Generally, brake fluid should be replaced every 2 years, but this interval may vary depending on usage conditions. The official maintenance intervals for brake fluid replacement differ among various vehicle brands, which is related to the brand of brake fluid and the vehicle model. Brake fluid has certain corrosive properties and strong water absorption. It is essential to replace brake fluid regularly when it reaches the maintenance time. It is best to follow the manufacturer's recommended maintenance schedule. Function of brake fluid: Brake fluid, also known as automotive hydraulic brake fluid. Early vehicles used mechanical drum brakes. Automotive brake fluid is the liquid used in hydraulic brake systems. When the driver presses the brake pedal, the force is transmitted by the master cylinder piston through the brake fluid to the wheel cylinders, causing the brake pads to expand and stop the vehicle. When the brake is released, return springs pull the brake pads back to their original position. Brake fluid plays the role of force transmission throughout this process. In the automotive braking system, brake fluid acts as a transmission medium. The driver steps on the brake pedal, and with the assistance of the vacuum booster, the force pushes the master cylinder, which in turn pushes the brake fluid. This force is transmitted through the brake fluid to the wheel cylinders at all four wheels, causing the brake calipers to push the brake pads against the brake discs, creating braking force.

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