The reason for not opening the door is:
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1, the battery is out of power: if the battery is out of power, the car can not start, the induction system on the car will naturally fail, at this time to charge the car.
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2, the induction key is out of power: the battery life of the general induction key is 2 years, if the battery is out of power, you can only open the spare mechanical key in the induction key to open the door.
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Even if you open the door, there is no way to start the vehicle. At this time, you only need to attach the sensor key to the sensor and then start the car. It should be noted that the position of the sensor in different cars is different.
Here's why the phone key won't open the door when Tesla is parked in an underground garage:
1. The mobile phone or vehicle is not connected to the Internet: when the Bluetooth key of the mobile phone is close to the unlock function, if you want to unlock by clicking the unlock icon of the Tesla APP, you need to ensure that the mobile phone and the vehicle are connected to the Internet before unlocking;
2, poor induction: although the maximum induction distance of Bluetooth is 9 meters, it will actually be interfered by a variety of signals, and it should be as close to the vehicle as possible and away from the signal interference source;