diff --git a/cyborg/api/controllers/v2/arqs.py b/cyborg/api/controllers/v2/arqs.py
index ef556c97..be2647ec 100644
--- a/cyborg/api/controllers/v2/arqs.py
+++ b/cyborg/api/controllers/v2/arqs.py
@@ -194,12 +194,9 @@ class ARQsController(base.CyborgController):
                         arq['state'] != 'BindFailed'):
                     unbound_flag = True
             if instance is not None and unbound_flag:
-                # Return HTTP code 'Locked'
-                # TODO(Sundar) This should return HTTP code 423
                 # if any ARQ for this instance is not resolved.
-                LOG.warning('HTTP Response should be 423')
-                pecan.response.status = http_client.LOCKED
-                return None
+                # Return HTTP code '423 Locked'
+                return wsme.api.Response(None, status_code=http_client.LOCKED)
 
         ret = ARQCollection.convert_with_links(arqs)
         LOG.info('[arqs:get_all] Returned: %s', ret)
diff --git a/cyborg/tests/unit/api/controllers/v2/test_arqs.py b/cyborg/tests/unit/api/controllers/v2/test_arqs.py
index e4760a0c..ac71eb4a 100644
--- a/cyborg/tests/unit/api/controllers/v2/test_arqs.py
+++ b/cyborg/tests/unit/api/controllers/v2/test_arqs.py
@@ -75,6 +75,16 @@ class TestARQsController(v2_test.APITestV2):
         for in_extarq, out_arq in zip(self.fake_extarqs, out_arqs):
             self._validate_arq(in_extarq.arq, out_arq)
 
+        # test get_all response "423 Locked"
+        instance_uuid = self.fake_extarqs[0].arq.instance_uuid
+        # set ARQ state to 'BindStarted'
+        self.fake_extarqs[0].arq.state = 'BindStarted'
+        mock_extarqs.return_value = self.fake_extarqs
+        url = '%s?instance=%s&bind_state=resolved' % (
+            self.ARQ_URL, instance_uuid)
+        response = self.get_json(url, self.headers)
+        self.assertEqual(http_client.LOCKED, response.status_int)
+
     @mock.patch('cyborg.objects.DeviceProfile.get_by_name')
     @mock.patch('cyborg.objects.ExtARQ.create')
     def test_create(self, mock_obj_extarq, mock_obj_dp):