How to Start a BYD Car When the Key Fob Battery is Dead?
2 Answers
If the car has a keyhole, you can use the mechanical key to start the vehicle. You can press the brake pedal or the "Start/Stop" switch, which will cause the smart start system warning light to illuminate and the vehicle's buzzer to sound once. Within 30 seconds after the buzzer sounds, bring the electronic smart key close to the "Start/Stop" switch, and the buzzer will sound again to indicate that the engine can be started. Within 5 seconds after this buzzer sound, press the "Start/Stop" switch to start the engine.
I discovered a clever method to start a BYD car when the key fob battery dies. In most BYD models, there's a physical key blade hidden inside the key fob - you can remove it to manually unlock the door. Once inside the vehicle, even with a depleted battery, placing the key in the car's induction zone (typically under the center console armrest or in the front cup holder) allows the system to detect its weak signal. Hold the start button for 2-3 seconds, and the engine will respond; this works by utilizing the car's built-in NFC or RFID short-range recognition function. If it still doesn't work, simply replace the CR2032 coin battery (a very common type) - it only costs a few dollars to DIY. I always carry a spare battery when traveling as a precaution. After successful ignition, promptly visit a professional shop to check the battery's remaining lifespan.
