Index: firmware/App/Monitors/Pressures.c
===================================================================
diff -u -reef41b7363d82763095a1317f1757f360f0d9ec1 -r7268c928b564afedfad29482f1751989596f242a
--- firmware/App/Monitors/Pressures.c	(.../Pressures.c)	(revision eef41b7363d82763095a1317f1757f360f0d9ec1)
+++ firmware/App/Monitors/Pressures.c	(.../Pressures.c)	(revision 7268c928b564afedfad29482f1751989596f242a)
@@ -1173,7 +1173,44 @@
     return result;
 }
 
+/*********************************************************************//**
+* @brief
+* The pressureLimitHandleWidenRequest function validates pressure limit
+* widening request received from the UI.
+* @details \b Message \b Received: MSG_ID_UI_PRESSURE_LIMIT_WIDEN_REQUEST
+* @details \b Message \b Sent: MSG_ID_TD_PRESSURE_LIMIT_WIDEN_RESPONSE
+* @details \b Inputs: none
+* @details \b Outputs: pressure limits widened and stabilization restarted
+* @param message set message from UI
+* @return TRUE if request is valid, FALSE if not
+*************************************************************************/
+BOOL pressureLimitHandleWidenRequest( MESSAGE_T *message )
+{
+    BOOL result = FALSE;
+    REQUEST_REJECT_REASON_CODE_T rejReason = REQUEST_REJECT_REASON_INVALID_REQUEST_FORMAT;
+    UI_RESPONSE_PAYLOAD_T response;
 
+    // Verify message payload length
+    if ( message->hdr.payloadLen == 0 )
+    {
+        // Apply widened pressure limits
+        setPressureLimitsToOuterBounds();
+        // Restart stabilization
+        stabilizationStartTimeMs = getMSTimerCount();
+        currPresLimitsState = PRESSURE_LIMITS_STATE_STABILIZATION;
+        result = TRUE;
+        rejReason = REQUEST_REJECT_REASON_NONE;
+    }
+
+    // Respond to request
+    response.accepted = result;
+    response.rejectionReason = rejReason;
+    sendMessage( MSG_ID_TD_PRESSURE_LIMIT_WIDEN_RESPONSE, COMM_BUFFER_OUT_CAN_TD_2_UI, (U08*)(&response), sizeof( UI_RESPONSE_PAYLOAD_T ) );
+
+    return result;
+}
+
+
 /*************************************************************************
  *                       TEST SUPPORT FUNCTIONS
  *************************************************************************/
Index: firmware/App/Monitors/Pressures.h
===================================================================
diff -u -reef41b7363d82763095a1317f1757f360f0d9ec1 -r7268c928b564afedfad29482f1751989596f242a
--- firmware/App/Monitors/Pressures.h	(.../Pressures.h)	(revision eef41b7363d82763095a1317f1757f360f0d9ec1)
+++ firmware/App/Monitors/Pressures.h	(.../Pressures.h)	(revision 7268c928b564afedfad29482f1751989596f242a)
@@ -94,6 +94,8 @@
 F32 getTMPPressure( void );
 F32 getBaroPressurePSI( void );
 
+BOOL pressureLimitHandleWidenRequest( MESSAGE_T *message );
+
 BOOL testPressuresDataPublishIntervalOverride( MESSAGE_T *message );
 BOOL testTMPOverride( MESSAGE_T *message );
 BOOL testBaroPressureOverride( MESSAGE_T * message );
Index: firmware/App/Services/Messaging.c
===================================================================
diff -u -rf289a9279e8e924fd11411df6a71ac6727b800bc -r7268c928b564afedfad29482f1751989596f242a
--- firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision f289a9279e8e924fd11411df6a71ac6727b800bc)
+++ firmware/App/Services/Messaging.c	(.../Messaging.c)	(revision 7268c928b564afedfad29482f1751989596f242a)
@@ -113,6 +113,7 @@
     { MSG_ID_UI_INITIATE_TREATMENT_WORKFLOW,                            &signalUserInitiateTreatment },
     { MSG_ID_UI_UF_PAUSE_RESUME_REQUEST,                                &signalPauseResumeUF },
     { MSG_ID_TESTER_LOGIN_REQUEST,                                      &handleTesterLogInRequest },
+    { MSG_ID_UI_PRESSURE_LIMIT_WIDEN_REQUEST,                           &pressureLimitHandleWidenRequest },
     { MSG_ID_TD_SOFTWARE_RESET_REQUEST,                                 &testTDSoftwareResetRequest },
     { MSG_ID_TD_BUBBLE_OVERRIDE_REQUEST,                                &testBubbleDetectOverride },
     { MSG_ID_TD_BUBBLE_PUBLISH_INTERVAL_OVERRIDE_REQUEST,               &testBubblesDataPublishIntervalOverride },