What is the reason for the limited functionality of the BYD Qin DMI EV?
2 Answers
The reason for the limited functionality of the BYD Qin DMI EV is damage to the vehicle's high-voltage system. Below are the relevant details: 1. Battery Management System Module Malfunction: A malfunction in the battery management system module can restrict the battery power output, causing the dashboard to display an EV function limitation alert. A technician will use a specialized automotive diagnostic computer to read the battery management system module data and determine if it is faulty. 2. Drive Motor Malfunction: A malfunction in the drive motor can trigger a system fault, leading to an EV function limitation alert on the dashboard. A technician will use a specialized automotive diagnostic computer to read the drive motor data and analyze it to determine if the motor is faulty. 3. Battery Overheat Protection: If the driver frequently accelerates abruptly while driving, it can cause the battery to overheat and enter a protection mode, limiting power output and resulting in an EV function limitation alert on the dashboard.
I've been driving the Qin DM-i for over two years and have encountered the EV function restriction warning several times. I remember once when the system reported an error and automatically switched to hybrid mode. After taking it to the 4S店 for inspection, they found that the battery management system software needed an upgrade. Also, during extremely cold winters, when temperature sensors detect low battery temperatures, it will restrict pure electric driving. If the charging port isn't properly connected or if an incompatible charging station is used, it can easily trigger the protection mechanism. It's important not to wait until the battery is completely depleted before charging, as the system will enforce battery protection. Once after washing the car, I charged it without drying the charging port, and the next day the function restriction appeared. In such cases, don't panic—pull over safely, turn off the power, wait a few minutes, and restart; it usually recovers. If not, contact after-sales service for inspection immediately.
