What is the reason for the red light flashing and green light staying on during BYD charging?

[BradleyRose]

BYD charging red light flashing and green light staying on reasons are as follows: Red light flashing: (If it is the power indicator light), then the voltage output is unstable, possibly due to insufficient current pulling the voltage down. Green light staying on: Green light staying on (if it is a dual-color charging indicator), then there is an issue with the sampling circuit. The sampling circuit may involve an operational amplifier integrated circuit such as LM358, or a sampling circuit composed of a voltage regulator and transistor. If damaged, it might detect the battery voltage as normal or fully charged, thus keeping the green light on. Two red lights: During normal charging, there should be two red lights; when the battery is disconnected, the charging indicator should be green.

[StClara]

I've been driving a BYD new energy vehicle for three to four years and have encountered the issue of flashing red light with steady green light several times. This usually indicates a fault during charging, such as excessive battery temperature or unstable power supply voltage. It was more noticeable during summer when charging under high temperatures caused the red light to flash, and it turned out to be the socket overheating triggering the protection mechanism. The solution is to immediately stop charging and try again after cooling down. If it persists, it might be due to aging battery modules or internal circuit issues, so it's best to get a professional check-up at a 4S store without delay. For prevention, choose a cool and well-ventilated spot for charging and use the original charger to reduce risks. These small habits can make the car more durable and safer. BYD's charging system is quite intelligent, and the light signals are prompts that shouldn't be ignored. During regular maintenance, I also check the battery health condition.

[SanTalia]

Charging a BYD at home is convenient and worry-free, but the situation with the red light flashing and green light staying on can be really nerve-wracking. After my family encountered this issue, we checked the manual and learned that this signal indicates charging interruption, possibly due to unstable power supply or the battery not being fully charged. Common causes include socket overload, poor charging cable contact, or low household voltage. We immediately stopped charging and contacted the service center, where they guided us to change the socket and check the wiring, resolving the problem. Remember, safety comes first—don’t force charging to avoid causing bigger faults. For daily maintenance, regularly check the cleanliness of the charging port and keep it dry to prevent short circuits. BYD’s after-sales service is quick and reliable. When traveling with family, always ensure everything runs smoothly to minimize risks.

[DiGage]

The charging indicator light shows red flashing and green steady on? This fault code is quite common in BYD's charging system. I've discussed it on electric vehicle technology forums, and the usual causes are abnormally high charging current, battery temperature exceeding limits, or controller detection errors. For example, flashing lights after full charge may indicate overcharge protection activation. The solution is to first disconnect power, wait a few minutes, then retry to see if system reboot restores normal operation. From a technical perspective, this protection mechanism is good, but frequent occurrences may indicate software bugs or hardware degradation. It's recommended to update vehicle software or professionally diagnose battery health. Use the vehicle reasonably, avoid abusing fast charging to prevent triggering alarms and ensure stable, safe performance.

[VonDakota]

BYD charging red light flashing and green light steady indicates charging failure. Clear troubleshooting steps: First, check if the charging connection is secure without looseness; second, test different sockets to rule out power supply issues; third, clean the vehicle-side port to ensure no debris obstruction. Simple faults like poor contact may resolve by retrying later. If persistent, it could be a blown fuse or battery pack depletion requiring part replacement. Act promptly and send for repair early to avoid affecting daily vehicle use. Safety tip: Avoid using low-quality extension cords during charging to prevent overheating risks, and maintain ventilation to reduce failure rates.

[Stacy]

When the charging indicator light shows a flashing red light and a steady green light, don't take it lightly. Common causes include extreme environmental temperatures, mismatched chargers, or internal battery balancing issues. My friend with a BYD encountered this during charging and later found at the service center that high humidity on rainy days caused circuit abnormalities. Prevention methods include developing regular maintenance habits, checking battery status, choosing stable locations for charging, and using original accessories to reduce failure rates. If the problem persists, stop charging immediately to avoid damage and contact BYD after-sales service directly—they are efficient and handle issues professionally. Proper long-term battery maintenance can extend its lifespan, save money, and ensure worry-free driving every day.