diff --git a/sfputil/debug.py b/sfputil/debug.py
index a23f7b3572..eb80969ee2 100644
--- a/sfputil/debug.py
+++ b/sfputil/debug.py
@@ -65,6 +65,10 @@ def loopback(port_name, loopback_mode, enable):
     lane_mask = get_subport_lane_mask(int(subport), lane_count)
 
     try:
+        if not api.get_diag_page_support():
+            click.echo(f"{port_name}: The module does not support diagnostic pages required for loopback configuration")
+            click.echo(f"{port_name}: {enable} {loopback_mode} loopback failed")
+            sys.exit(EXIT_FAIL)
         status = api.set_loopback_mode(loopback_mode, lane_mask=lane_mask, enable=(enable == 'enable'))
     except AttributeError:
         click.echo(f"{port_name}: Set loopback mode is not applicable for this module")
diff --git a/tests/sfputil_test.py b/tests/sfputil_test.py
index ddfb4c8d41..0b0e3611c2 100644
--- a/tests/sfputil_test.py
+++ b/tests/sfputil_test.py
@@ -1783,6 +1783,7 @@ def test_debug_loopback(self, mock_sonic_v2_connector, mock_config_db_connector,
         mock_state_db = MagicMock()
         mock_state_db.get.return_value = 1
         mock_sonic_v2_connector.return_value = mock_state_db
+        mock_api.get_diag_page_support.return_value = True
         result = runner.invoke(sfputil.cli.commands['debug'].commands['loopback'],
                                ["Ethernet0", "host-side-input", "enable"])
         assert result.output == 'Ethernet0: enable host-side-input loopback\n'
@@ -1794,6 +1795,15 @@ def test_debug_loopback(self, mock_sonic_v2_connector, mock_config_db_connector,
         assert result.output == 'Ethernet0: enable media-side-input loopback\n'
         assert result.exit_code != ERROR_NOT_IMPLEMENTED
 
+        mock_api.get_diag_page_support.return_value = False
+        result = runner.invoke(sfputil.cli.commands['debug'].commands['loopback'],
+                               ["Ethernet0", "media-side-output", "enable"])
+        assert result.output == (
+            'Ethernet0: The module does not support diagnostic pages required for loopback configuration\n'
+            'Ethernet0: enable media-side-output loopback failed\n')
+        assert result.exit_code == EXIT_FAIL
+
+        mock_api.get_diag_page_support.return_value = True
         mock_api.set_loopback_mode.return_value = False
         result = runner.invoke(sfputil.cli.commands['debug'].commands['loopback'],
                                ["Ethernet0", "media-side-output", "enable"])