What are the reasons for the Nissan Teana key not being detected and unable to start?

[LeReid]

The reasons why the Nissan Teana keyless start system may not work could be due to either the key fob battery being dead or the vehicle battery being dead. If the vehicle still cannot start after ruling out these two possibilities, then there may be other faults. It could be an issue with the key fob or the vehicle's sensing module, in which case you would need to visit a 4S store for repairs. 1. Introduction: Nissan Teana models equipped with the keyless start system have sensors inside the vehicle. If the key fob battery is dead, the sensor cannot detect the key, and the vehicle will not start. In this case, placing the key fob near the sensor may sometimes allow the vehicle to start. Nissan Teana owners can find the location of the sensor by referring to the vehicle manual. 2. Additional Information: The Nissan Teana keyless entry system has a specific authentication zone. A valid key must be detected within this effective authentication zone; outside this zone, normal entry and start-up are not possible. The authentication zone is divided into external and internal zones. The blue area in the diagram represents the external authentication zone, which is within a 1.5-meter range near the exterior door handle.