Why Can't the Car Key Unlock When the Red Light Flashes?

[AustinLynn]

The reason why the car key cannot unlock when the red light flashes is due to low battery in the key remote or a dead car battery. The detailed explanations are as follows: 1. Low battery in the key remote: When the battery is insufficient, the small red light on the key can still be on, but its brightness is dim compared to a fully charged battery. The battery's remaining power can only support the small red signal light to emit a faint glow but is insufficient to transmit the unlock signal. 2. Dead car battery: If the car battery is dead, the entire vehicle loses power. 3. Data loss: The small red light on the remote may still be on, but if the internal data is lost, the signal will also be absent.