diff --git a/genmonlib/generac_evolution.py b/genmonlib/generac_evolution.py
index d6ae2c06..f5f92ef7 100644
--- a/genmonlib/generac_evolution.py
+++ b/genmonlib/generac_evolution.py
@@ -3632,34 +3632,36 @@ def GetEngineState(self, Reg0001Value=None):
         # Cranking
         # Cranking Warning
         # Cranking Alarm
-        if self.BitIsEqual(RegVal, 0x000F0000, 0x00040000):
+        if self.BitIsEqual(RegVal, 0x001F0000, 0x00040000):
             return "Exercising"
-        elif self.BitIsEqual(RegVal, 0x000F0000, 0x00090000):
+        elif self.BitIsEqual(RegVal, 0x001F0000, 0x00090000):
             return "Stopped"
         # Note: this appears to define the state where the generator should start, it defines
         # the initiation of the start delay timer, This only appears in Nexus and Air Cooled Evo
-        elif self.BitIsEqual(RegVal, 0x000F0000, 0x00010000):
+        elif self.BitIsEqual(RegVal, 0x001F0000, 0x00010000):
             return "Startup Delay Timer Activated"
-        elif self.BitIsEqual(RegVal, 0x000F0000, 0x00020000):
+        elif self.BitIsEqual(RegVal, 0x001F0000, 0x00020000):
             if self.SystemInAlarm():
                 return "Cranking in Alarm"
             else:
                 return "Cranking"
-        elif self.BitIsEqual(RegVal, 0x000F0000, 0x00050000):
+        elif self.BitIsEqual(RegVal, 0x001F0000, 0x00050000):
             return "Cooling Down"
-        elif self.BitIsEqual(RegVal, 0x000F0000, 0x00030000):
+        elif self.BitIsEqual(RegVal, 0x001F0000, 0x00030000):
             if self.SystemInAlarm():
                 return "Running in Alarm"
             else:
                 return "Running"
-        elif self.BitIsEqual(RegVal, 0x000F0000, 0x00080000):
+        elif self.BitIsEqual(RegVal, 0x001F0000, 0x00080000):
             return "Stopped in Alarm"
-        elif self.BitIsEqual(RegVal, 0x000F0000, 0x00060000):
+        elif self.BitIsEqual(RegVal, 0x001F0000, 0x00060000):
             return "Running in Warning"
-        elif self.BitIsEqual(RegVal, 0x000F0000, 0x00000000):
+        elif self.BitIsEqual(RegVal, 0x001F0000, 0x00000000):
             return "Off - Ready"
-        elif self.BitIsEqual(RegVal, 0x000F0000, 0x000F0000):   # added for Evo 4.5L
+        elif self.BitIsEqual(RegVal, 0x001F0000, 0x000F0000):   # added for Evo 4.5L
             return "Off - Remote Switch Off"
+        elif self.BitIsEqual(RegVal, 0x001F0000, 0x001F0000):   # added for Evo 4.5L
+            return "Firmware Update in Progress"
         else:
             self.FeedbackPipe.SendFeedback(
                 "Unknown EngineState",