diff --git a/.pytool/Plugin/UncrustifyCheck/Readme.md b/.pytool/Plugin/UncrustifyCheck/Readme.md
index bb263bcc87..0c46fd241a 100644
--- a/.pytool/Plugin/UncrustifyCheck/Readme.md
+++ b/.pytool/Plugin/UncrustifyCheck/Readme.md
@@ -42,7 +42,7 @@ The plugin can be configured with a few optional configuration options.
       "AuditOnly": False,           # Don't fail the build if there are errors.  Just log them.
       "ConfigFilePath": "",         # Custom path to an Uncrustify config file.
       "IgnoreStandardPaths": [],    # Standard Plugin defined paths that should be ignored.
-      "OutputFileDiffs": False,     # Output chunks of formatting diffs in the test case log.
+      "OutputFileDiffs": True,      # Output chunks of formatting diffs in the test case log.
                                     # This can significantly slow down the plugin on very large packages.
       "SkipGitExclusions": False    # Don't exclude git ignored files and files in git submodules.
   }
@@ -82,7 +82,7 @@ to be ignored.
 
 ### `OutputFileDiffs`
 
-`Boolean` - Default is `False`.
+`Boolean` - Default is `True`.
 
 If `True`, output diffs of formatting changes into the test case log. This is helpful to exactly understand what changes
 need to be made to the source code in order to fix a coding standard compliance issue.
diff --git a/.pytool/Plugin/UncrustifyCheck/UncrustifyCheck.py b/.pytool/Plugin/UncrustifyCheck/UncrustifyCheck.py
index 6db8d1739a..ea8396942b 100644
--- a/.pytool/Plugin/UncrustifyCheck/UncrustifyCheck.py
+++ b/.pytool/Plugin/UncrustifyCheck/UncrustifyCheck.py
@@ -494,13 +494,13 @@ class UncrustifyCheck(ICiBuildPlugin):
         Initializes options that influence test case output.
         """
         self._audit_only_mode = False
-        self._output_file_diffs = False
+        self._output_file_diffs = True
 
         if "AuditOnly" in self._package_config and self._package_config["AuditOnly"]:
             self._audit_only_mode = True
 
-        if "OutputFileDiffs" in self._package_config and self._package_config["OutputFileDiffs"]:
-            self._output_file_diffs = True
+        if "OutputFileDiffs" in self._package_config and not self._package_config["OutputFileDiffs"]:
+            self._output_file_diffs = False
 
     def _log_uncrustify_app_info(self) -> None:
         """