What Causes Abnormal Noise and Failure to Start When Igniting the Car?

[DeWalter]

The reasons for abnormal noise and failure to start when igniting the car are: insufficient battery power or low voltage. 1. Before turning off the car, forgetting to turn off the headlights or some electrical equipment may cause the battery to drain, resulting in insufficient power. 2. If the battery has been used for too long and is severely aged, the voltage may be insufficient, requiring replacement. Additional information: The method to determine whether the battery has sufficient power is: Turn the ignition key to the ON position (for push-button start models, press the start button twice without stepping on the brake), turn on the headlights, and observe if the light dims significantly or does not light up at all. You can also press the horn; if the sound is noticeably weaker than usual or does not sound at all, it can be concluded that the battery power is insufficient.