Why does the Nissan Tiida display 'key' and fail to start?

[HavenFitz]

There are several main reasons why the Nissan Tiida displays 'key' and fails to start: Insufficient key battery: Although the indicator light still works when pressing the buttons on the remote key, the battery is already nearly depleted and cannot emit a strong enough radio signal for the sensor to receive. As a result, 'no-key' is displayed when attempting to start the car. In this case, simply press the start button with the remote key or place the key in a designated induction area to start the car. Interference from in-car devices: Many car owners install various accessories in their vehicles, such as heads-up displays, navigation systems, tire pressure monitors, etc. These devices may interfere with the sensor's ability to receive signals from the key.