Index: firmware/App/Modes/ModePreTreat.c
===================================================================
diff -u -rf373b6c38077c7e6071939e702fab65db58c1146 -rca8a4a4cf6d2c59d9296c3abdf314765550a2624
--- firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision f373b6c38077c7e6071939e702fab65db58c1146)
+++ firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision ca8a4a4cf6d2c59d9296c3abdf314765550a2624)
@@ -7,8 +7,8 @@
 *
 * @file    ModePreTreat.c
 *
-* @author  (last)      Vinayakam Mani
-* @date    (last)      22-Nov-2023
+* @author  (last)      Dara Navaei
+* @date    (last)      31-Oct-2024
 *
 * @author  (original)  Dara Navaei
 * @date    (original)  05-Nov-2019
@@ -1176,6 +1176,12 @@
     {
         DG_RESERVOIR_ID_T activeRes = getDGActiveReservoir();
 
+        if ( TRUE == isBloodLeakZeroingNeeded() )
+        {
+            // If the sensor has drifted request a zero prior to transitioning to treatment
+            zeroBloodLeak();
+        }
+
         patientConnectionConfirm = FALSE;
         doorOpened               = FALSE;
         setStartReservoirVolume( activeRes );