What are the reasons for the malfunction of Toyota Corolla remote control?

[VonThomas]

Toyota Corolla remote control malfunction reasons are as follows: Remote key battery dead: If the remote key battery is dead, it certainly cannot lock the doors. You only need to use the mechanical key to lock them. This is something people usually don't pay attention to, and it's also easy to handle later—just open it up and replace the battery. Remote lock malfunction: If the remote key cannot lock the doors, it could also be due to a malfunctioning remote lock or factors like aging of the car's remote transmitter antenna. Magnetic field interference: Some areas may have strong magnetic signal interference, and the remote key itself uses low-intensity radio waves.