diff --git a/adafruit_pm25/uart.py b/adafruit_pm25/uart.py
index 22db421..68bfeb9 100644
--- a/adafruit_pm25/uart.py
+++ b/adafruit_pm25/uart.py
@@ -171,6 +171,8 @@ def pin_reset(self):
             time.sleep(0.01)
             self._reset_pin.value = True
             time.sleep(3)
+            if self._mode == "passive":
+                self.cmd_mode_passive()
 
     def pin_sleep(self):
         """