What are the causes of the BYD Song electronic parking brake system malfunction?

[VonColeman]

The causes of the BYD Song electronic parking brake system malfunction include EPB switch failure, wiring faults, and EPB controller failure. Below is a detailed explanation of the causes and solutions for this malfunction: EPB switch failure: EFB switch failure means the electronic parking brake completely fails, and the electronic parking system cannot function normally. You can check if there are any short circuits, open circuits, or loose connections at the switch. Wiring faults: If there is a wiring fault in the electronic parking system, it cannot work properly. The continuity of the wiring needs to be checked. EFB controller failure: If the controller malfunctions, it leads to functional disorders and the inability to receive normal commands. Replacing the controller can solve the problem.

[Imogen]

That time my BYD Song's electronic parking system malfunctioned, and there were quite a few reasons identified after troubleshooting. The electronic control module seemed to have a short circuit in its 'brain', failing whenever there was voltage fluctuation; sensors like the gradient sensor were prone to getting clogged with dust, preventing signal transmission; the brake actuator could jam or lack sufficient lubrication, leading to sluggish response; aging and loose wiring harness connectors would trigger errors with intermittent current flow; software bugs could also cause trouble, potentially requiring a dealership update. Safety-wise, this malfunction is particularly dangerous when parking on steep slopes, as unintended vehicle movement could have severe consequences. I recommend ensuring sufficient battery voltage before each operation and avoiding rainy or uneven terrain usage. Regular maintenance checks on wiring harnesses and sensor cleaning can significantly reduce risks – don't wait until problems escalate before repairing.

[Malachi]

My beloved BYD Song's electronic parking brake malfunction gave me a scare, with reasons mainly focusing on several aspects: the operation button may have poor contact or be stuck by debris; system software crash, especially unstable after frequent starts; insufficient battery power affecting the power supply; wheel speed sensor dust accumulation causing signal distortion; or brake component wear and fatigue. From a safety perspective, malfunctions can easily cause the car to roll on slopes, leading to accidents, so I make it a habit to check the road slope before parking. In terms of cost, minor repairs like cleaning the sensors are not expensive, but module failure replacements can cost thousands. It's recommended to pay attention to battery maintenance in daily operations and frequently use diagnostic tools to check error codes. Don't skimp on timely repairs—driving safety comes first.

[FaithLee]

I've been driving a BYD Song for many years. Electronic parking brake issues are usually caused by sensor dust accumulation or loose wiring. Button switch contact wear is common; rusted wiring connectors lead to poor current flow; battery voltage fluctuations trigger system errors. Simple checks: first check battery status; gently shake the wiring harness; try restarting the engine. Use manual mode as a temporary substitute when malfunctioning. For maintenance, clean regularly to prevent dust. Don't make a mountain out of a molehill.