What does the BYD Song EV restriction mean?

[EliasMarie]

BYD Song EV restriction means that the high-voltage electrical part of the vehicle cannot function properly. EV restriction implies: This does not mean the entire high-voltage system is damaged, but rather that a certain component has an issue, activating the high-voltage interlock program of the system. It's somewhat similar to older Volkswagen vehicles, where if just one small part fails, the entire car won't start. Causes of EV function restriction: There are many possible causes, such as issues with the air conditioning, cooling water pump, high-voltage electrical box, transmission, power battery, or blown fuses. In short, it's not a common problem, but these faults will activate the high-voltage interlock protection mechanism. Simple solution: Try restarting the vehicle to see if the issue resolves. If not, it indicates the problem is beyond what an ordinary owner can fix. To troubleshoot the EV function restriction, you need to connect an OBD scanner to read the fault codes and data stream, identify the exact issue, and then address it accordingly.