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What does the letter P on a car mean?

1 Answers

CarlosAnn

07/24/25 7:18pm

On a car, the letter P stands for the parking brake indicator light, also known as the parking indicator. The parking brake indicator light is used to display the status of the vehicle's parking brake, typically in red. When the P is illuminated, it means the parking brake is engaged—either the handbrake is pulled up or the electronic brake is activated. The professional term for the handbrake is auxiliary brake, which operates differently from the main braking system. It uses a steel cable connected to the rear brake shoes to apply braking force to the vehicle. Prolonged use of the handbrake can cause the steel cable to undergo plastic deformation, which is irreversible. Over time, this can reduce the effectiveness of the handbrake, increase its travel distance, and the return spring that works in conjunction with the handbrake may also be affected.

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