What is the reason for the continuous display of the new energy power failure light?
4 Answers
New energy power failure light keeps displaying due to power failure, insufficient battery, high-voltage disconnection fault, or internal power battery failure. Power failure: This warning light usually appears together with other warning lights, indicating a power failure. It can also light up alone, indicating a communication failure in the system bus, hence this warning light appears frequently. Insufficient battery: This warning light is merely an indicator, similar to the fuel warning light in conventional fuel vehicles, indicating that the electric vehicle's battery is low and needs to be charged promptly. High-voltage disconnection fault: When this light is on, it indicates that the high-voltage power inside the vehicle is disconnected. The fault is usually caused by poor battery contact or power disconnection, leading to a severe failure in the vehicle's high-voltage system. Internal power battery failure: When this warning light is on, it indicates an internal failure in the electric vehicle's battery pack. Most of the time, when this light is on, the internal power battery failure is due to high-voltage disconnection, rendering the vehicle unable to drive normally. In rare cases, the vehicle may still drive slowly but cannot accelerate.
I've been driving a new energy vehicle for five years, and it's quite common for the power fault light to stay on. The reasons include battery system failures such as voltage imbalance or internal module damage, which can cause the system to report false alarms. Last time my car's light came on, the inspection revealed an issue with the coolant circulation pump, triggering the battery's overheating protection. It could also be a problem with the motor controller or sensor data drift. Ignoring it poses significant risks, such as further battery aging, shortened lifespan, or even fire hazards, so it's advisable to connect a diagnostic tool to read the error codes and identify the cause as soon as possible. You can check the coolant level yourself to ensure it's within the normal range, but high-voltage components should be handled by professionals to avoid electric shock. For daily charging, avoid full discharge and full charge cycles. Opting for a smart charging station with a shallow charge and discharge mode can help prevent such issues and extend the battery's service life.
As a long-time automotive technology enthusiast, I believe the root cause of the power fault light being on lies in the electrical control system. The core of new energy vehicles is the high-voltage battery and drive motor. The light often indicates that the battery management unit has detected abnormalities such as excessive single-cell voltage or SOC calculation errors, triggering a warning. Possible causes include lost motor feedback signals or the need for controller software updates to resolve bugs. Clogged cooling fans or pump failures can also lead the system to assess risk and illuminate the warning light. The solution is to use professional tools to scan the OBD interface to identify the error type. Minor issues can be addressed through software resets or upgrades. For safety, it is absolutely imperative not to continue driving to prevent overcurrent damage to more expensive components like the inverter. Regular comprehensive system diagnostics and maintenance at authorized service centers are key preventive measures.
I commute with a new energy vehicle, and this time the power fault light keeps coming on, which might indicate an issue with the battery system. Common causes include significant voltage differences within the battery pack, excessively high motor temperatures, or warning signals triggered by control module defects. A cooling circuit leak can also cause this. Quickly connect a diagnostic tool to check the error codes and locate the fault point—don’t ignore it to prevent a minor issue from becoming a major one. For regular maintenance, just check the tires and charging status yourself, but avoid touching high-voltage cables.
