Why don't the hazard lights flash when remotely unlocking the car doors?

[McChristopher]

Why don't the hazard lights flash when remotely unlocking the car doors? The reasons may be the following: 1. Remote key battery dead: If the remote key is out of power, it certainly can't lock the doors. Just use the mechanical key to lock them. This is something people usually don't pay attention to, and it's easy to handle later by opening it up and replacing the battery. 2. Remote lock malfunction: The inability to lock the doors with the remote key could also be due to a malfunctioning remote lock or factors like the aging of the car's remote transmitter antenna. This is also easy to detect, and then you can use the mechanical key to lock the doors. 3. Magnetic interference: Some areas may have strong magnetic signal interference, and since the remote key itself uses low-intensity radio waves, it cannot function properly under magnetic interference, naturally making it impossible to lock the doors.