diff --git a/phosphor-regulators/src/actions/compare_presence_action.hpp b/phosphor-regulators/src/actions/compare_presence_action.hpp
index b16c98f..f2038d1 100644
--- a/phosphor-regulators/src/actions/compare_presence_action.hpp
+++ b/phosphor-regulators/src/actions/compare_presence_action.hpp
@@ -44,7 +44,8 @@
     /**
      * Constructor.
      *
-     * @param fru Field-Replaceable Unit (FRU)
+     * @param fru Field-Replaceable Unit (FRU). Specify the D-Bus inventory path
+     *            of the FRU.
      * @param value Expected presence value
      */
     explicit ComparePresenceAction(const std::string& fru, bool value) :
@@ -55,8 +56,13 @@
     /**
      * Executes this action.
      *
-     * @param environment Action execution environment.
-     * @return true
+     * Compares the actual presence value to the expected value.
+     *
+     * Throws an exception if an error occurs.
+     *
+     * @param environment action execution environment
+     * @return true if the actual presence value equals the expected value,
+     *         otherwise returns false
      */
     virtual bool execute(ActionEnvironment& environment) override;
 
@@ -91,7 +97,7 @@
     /**
      * Field-Replaceable Unit (FRU) for this action.
      *
-     * Specify the D-Bus inventory path of the FRU.
+     * The D-Bus inventory path of the FRU.
      */
     const std::string fru{};
 
diff --git a/phosphor-regulators/src/actions/compare_vpd_action.cpp b/phosphor-regulators/src/actions/compare_vpd_action.cpp
new file mode 100644
index 0000000..1049cee
--- /dev/null
+++ b/phosphor-regulators/src/actions/compare_vpd_action.cpp
@@ -0,0 +1,58 @@
+/**
+ * Copyright © 2021 IBM Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "compare_vpd_action.hpp"
+
+#include "action_error.hpp"
+
+#include <exception>
+#include <sstream>
+
+namespace phosphor::power::regulators
+{
+
+bool CompareVPDAction::execute(ActionEnvironment& environment)
+{
+    bool isEqual{false};
+    try
+    {
+        // Get actual VPD keyword value
+        std::string actualValue =
+            environment.getServices().getVPD().getValue(fru, keyword);
+
+        // Check if actual value equals expected value
+        isEqual = (actualValue == value);
+    }
+    catch (const std::exception& e)
+    {
+        // Nest exception within an ActionError so the caller will have both the
+        // low level error information and the action information.
+        std::throw_with_nested(ActionError(*this));
+    }
+    return isEqual;
+}
+
+std::string CompareVPDAction::toString() const
+{
+    std::ostringstream ss;
+    ss << "compare_vpd: { ";
+    ss << "fru: " << fru << ", ";
+    ss << "keyword: " << keyword << ", ";
+    ss << "value: " << value << " }";
+    return ss.str();
+}
+
+} // namespace phosphor::power::regulators
diff --git a/phosphor-regulators/src/actions/compare_vpd_action.hpp b/phosphor-regulators/src/actions/compare_vpd_action.hpp
index 7dc5136..af7e085 100644
--- a/phosphor-regulators/src/actions/compare_vpd_action.hpp
+++ b/phosphor-regulators/src/actions/compare_vpd_action.hpp
@@ -18,7 +18,6 @@
 #include "action.hpp"
 #include "action_environment.hpp"
 
-#include <sstream>
 #include <string>
 
 namespace phosphor::power::regulators
@@ -62,16 +61,15 @@
     /**
      * Executes this action.
      *
-     * TODO: Not implemented yet
+     * Compares the actual VPD keyword value to the expected value.
      *
-     * @param environment Action execution environment.
-     * @return true
+     * Throws an exception if an error occurs.
+     *
+     * @param environment action execution environment
+     * @return true if the keyword value equals the expected value, otherwise
+     *         returns false
      */
-    virtual bool execute(ActionEnvironment& /* environment */) override
-    {
-        // TODO: Not implemented yet
-        return true;
-    }
+    virtual bool execute(ActionEnvironment& environment) override;
 
     /**
      * Returns the Field-Replaceable Unit (FRU).
@@ -108,20 +106,13 @@
      *
      * @return description of action
      */
-    virtual std::string toString() const override
-    {
-        std::ostringstream ss;
-        ss << "compare_vpd: { ";
-        ss << "fru: " << fru << ", ";
-        ss << "keyword: " << keyword << ", ";
-        ss << "value: " << value << " }";
-
-        return ss.str();
-    }
+    virtual std::string toString() const override;
 
   private:
     /**
-     * Field-Replaceable Unit (FRU) that contains the VPD.
+     * Field-Replaceable Unit (FRU) for this action.
+     *
+     * The D-Bus inventory path of the FRU.
      */
     const std::string fru{};