What are the reasons for the BYD Qin DMi-EV being restricted?
2 Answers
BYD Qin DMi-EV being restricted may be caused by battery pack failure, BMS failure, drive motor controller failure, or related circuit failure. When the vehicle has an EV function restriction, it should be immediately taken to a repair shop or 4S store for professional repair to avoid unnecessary trouble during use. Below is related information: Advantages of pure electric vehicles: The biggest advantage is that they are very environmentally friendly, generally producing no tailpipe emissions, so they do not cause pollution to the environment. Moreover, pure electric vehicles produce very little noise during driving, making the ride quite comfortable. Disadvantages of pure electric vehicles: However, the disadvantages of pure electric vehicles are also quite clear, namely that their range is certainly not as good as that of fuel-powered vehicles. If in remote areas, charging may not be very convenient. Furthermore, in terms of nationwide coverage, pure electric vehicles still have a long way to go.
Previously, my BYD Qin DM-i also displayed an 'EV restricted' warning. That time, it happened when the battery was below 20% and I frequently accelerated hard, resulting in a yellow warning light popping up. Later, I learned that this is BYD's protection mechanism. When the battery voltage is unstable or the temperature is too high, the system automatically switches to hybrid mode to prevent battery over-discharge. Common causes also include failure of the battery pack cooling system. If the water pump fails during high summer temperatures and cooling can't keep up, it's easy to trigger this warning. Additionally, poor contact in high-voltage circuits or glitches in the control program can also cause this alert. Back then, the 4S dealership replaced a certain module in the electronic control unit for free to fix it. It's best to avoid letting the battery level drop into the red zone during normal use and to regularly check the coolant level for safety.
