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What is the reason for the red electronic parking brake light?

2 Answers

NorahLynn

08/29/25 4:32am

The reason for the red electronic parking brake light being on is that there is an issue with the brake pads or signal lights. It is recommended to use an automotive diagnostic tool to identify the specific problem before proceeding with repairs. Additional knowledge: 1. Working principle of cable-type electronic parking brake: When the driver presses and holds the electronic parking brake switch, the emergency braking function is activated. When the service brake is functioning normally, the ESP system (Electronic Stability Program) controls the service brake to apply braking force to all four wheels. If the service brake fails, the electronic parking brake control unit evaluates signals from the four-wheel speed sensors, applies braking force to the rear wheels, and prevents them from locking up. In this scenario, the request to illuminate the brake lights is sent by the electronic parking brake control unit. 2. Working principle of caliper-type electronic parking brake: When the driver pulls the electronic parking brake button to engage the parking brake, the parking brake control module motor located on the rear brake calipers starts rotating, applying braking force to the brake discs. Simultaneously, the traditional hydraulic braking system also engages to make the braking response more agile. When the vehicle is parked, the driver can automatically release the parking brake by pressing the accelerator pedal or applying the brake (with a braking force of 10bar).

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MacKiara

09/11/25 2:20am

The red electronic parking brake indicator usually signals a minor system issue. I've encountered this several times while driving. Possible causes include electronic module failure, sensor malfunction, or poor wiring contact. Sometimes damp weather causes connector oxidation that interrupts signals, triggering the red light; it could also indicate failed parking brake initialization requiring reset. Additionally, low vehicle battery voltage affects all electronic systems including the parking brake. Once I neglected this issue and couldn't release the brake after starting, nearly getting stuck on the road - quite dangerous. First check fuses or try system reboot yourself; if unresolved, visit a professional repair shop. Untreated faults may disable proper parking brake operation, compromising braking safety. Remember to scan instrument panel before driving and address issues promptly.

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