Index: MsgDefs.h
===================================================================
diff -u -rfa5fe7530ef35c0c50d4df0a71623d182ba81086 -r864a60dacbff9588dbf97333e28119b7a56ae261
--- MsgDefs.h	(.../MsgDefs.h)	(revision fa5fe7530ef35c0c50d4df0a71623d182ba81086)
+++ MsgDefs.h	(.../MsgDefs.h)	(revision 864a60dacbff9588dbf97333e28119b7a56ae261)
@@ -8,8 +8,8 @@
 *
 * @file    MsgDefs.h
 *
-* @author  (last)      Michael Garthwaite
-* @date    (last)      21-Nov-2022
+* @author  (last)      Dara Navaei
+* @date    (last)      21-Dec-2022
 *
 * @author  (original)  Sean
 * @date    (original)  27-Feb-2020
@@ -221,9 +221,18 @@
     MSG_ID_DG_CPLD_STATUS = 0xBD,                                       ///< DG CPLD Status
     MSG_ID_HD_BATTERY_MANAGEMENT_DATA = 0xBE,                           ///< HD battery management logging data
     MSG_ID_HD_BATTERY_STATUS_DATA = 0xBF,                               ///< HD battery status logging data
-    MSG_ID_DG_HEAT_DISINFECT_ACTIVE_COOL_DATA = 0xC0,                   ///< DG heat disinfect active cool data broadcast
-    MSG_ID_DG_START_STOP_HEAT_DISINFECT_ACTIVE_COOL = 0xC1,             ///< DG heat disinfect active cool start/stop command
+    MSG_ID_DG_CHEM_DISINFECT_FLUSH_DATA = 0xC0,                         ///< DG chemical disinfect flush logging data
+    MSG_ID_DG_CHEM_DISINFECT_FLUSH_TIME_DATA = 0xC1,                    ///< DG broadcast of chemical disinfect flush mode time data
+    MSG_ID_DG_START_STOP_CHEM_DISINFECT_FLUSH = 0xC2,                   ///< DG start/stop chemical disinfect flush
+    MSG_ID_UI_CHEM_DISINFECT_FLUSH_CONFIRM = 0xC3,                      ///< UI confirmation of chemical disinfect flush start
+    MSG_ID_HD_CHEM_DISINFECT_FLUSH_CONFIRM_RESPONSE = 0xC4,             ///< HD response to confirmation of chemical disinfect flush start
+    MSG_ID_DG_HEAT_DISINFECT_ACTIVE_COOL_DATA = 0xC5,                   ///< DG heat disinfect active cool data broadcast
+    MSG_ID_DG_START_STOP_HEAT_DISINFECT_ACTIVE_COOL = 0xC6,             ///< DG heat disinfect active cool start/stop command
 
+#ifdef EMC_TEST_BUILD
+    MSG_ID_CAN_ERROR_COUNT = 0x999,  // test code in support of EMC testing
+#endif
+
     // service/test CAN messages
     MSG_ID_FIRST_TESTER_MESSAGE = 0x8000,                               ///< First HD test message ID
     MSG_ID_TESTER_LOGIN_REQUEST = MSG_ID_FIRST_TESTER_MESSAGE,          ///< HD tester log-in