A door ajar sensor is a safety feature that alerts you when a door is not fully closed. On a 2011 F150, you usually see a light on the dashboard or hear a chime. The sensor is located in the door jamb and uses a magnet to detect when the door is closed. If the sensor is not working properly, you may not be alerted when a door is open, which could lead to a safety hazard or damage to your truck.
There are several reasons why the door ajar sensor may not be working properly. One possibility is that the magnet in the door jamb is not aligned properly. Another possibility is that the sensor itself is faulty. You can try to fix the sensor yourself by following these steps:
