There are several situations where the key cannot open the car door: 1. The remote key cannot open the car door: If there is no time to replace the battery, you can use the mechanical key to open the car door. Generally, remote keys have a hidden mechanical key. 2. The remote key is interfered with by signals: It is relatively rare for the key signal to be interfered with. When you ensure that the key battery has power and the following situations occur, it can be judged as signal interference: (1) If the vehicle is often parked in the same location and the key cannot open the car door, but this does not happen elsewhere. (2) When there is a signal source near the vehicle, the car key cannot open the car door; after the signal source moves away from the vehicle, the car door can be opened normally. 3. The connection device between the door handle and the door lock itself is faulty: Since the door connection mechanism may fall off due to driving bumps, the door lock cannot sense the action of pulling the door handle. 4. The car door is frozen and cannot be opened in winter: If the car door lock, door handle, or door frame is frozen in winter, then the key will definitely not open the car door. Note that if the car door is frozen, do not pull it violently, as this can easily damage the car door. Only use hot water to pour on the frozen part to speed up the melting of the ice.
