door sensor on 2006 Nissan Murano

the door sensor keeps popping up and a warning appears on the screen while driving, but i have checked all the the doors and shut them firmly, what could be the reason for this?

Asked by for the 2006 Nissan Murano
The sensor that tells the "display" that the door is open may be faulty. The switch used to always be in the door pillar but a lot of newer cars build the switch into the door lock mechanism in the door and use its input for locking and security control as well. The one that will most ofter fail is the door most often used (the driver's door).