1. The vehicle cannot start due to power failure or electrical circuit failure. You can check the battery, circuit, and fuse to confirm that the circuit connection is normal and the battery is fully charged.

2. Engine stalling occurs. Can check engine sealing, circuit connections, ignition system, and adjust valve timing. Also, pay attention to whether the fuel injection system is functioning properly.

3. Engine stall occurs. You can check if the air filter, fuel filter, oil pump, valves, and ignition system are functioning properly, as these issues may cause the engine to stall.