Nissan X-Trail e-POWER 2023 Owners Manual
5.4.3.10.
Low temperature indicator light (green)
The low temperature indicator light illuminates when the engine coolant temperature is low.
If the low temperature indicator light stays illuminated after the engine has sufficiently warmed up, it may indicate the low temperature sensor in the engine coolant system is not functioning properly and may need servicing. Have the system checked, and if necessary repaired, by a NISSAN dealer or qualified workshop promptly.
Owners Manual