Why does Volkswagen display 'nokey' and fail to start with one-button ignition?

[McJosiah]

When Volkswagen's one-button ignition displays 'nokey,' it means the vehicle's key sensing device has not detected the remote key. The reasons for the key not being detected include: Insufficient key battery power. Although the indicator light on the remote key may still illuminate when pressing the buttons, the battery can no longer emit a strong enough radio signal for the sensor to receive, resulting in the 'nokey' display when starting the vehicle. In this case, simply press the start button with the remote key or place the key in a designated sensing area to start the vehicle. 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. Sensor malfunction. Generally, vehicles have key sensors located in areas such as the dashboard, under the center armrest, and under the rear seats. If these sensors malfunction or their connectors become loose, the vehicle may fail to detect the key. Insufficient vehicle battery power. If the vehicle's battery is low on power, it cannot supply electricity to the vehicle's electrical devices, naturally preventing the remote key from being detected.