diff --git a/phosphor-regulators/src/actions/compare_presence_action.cpp b/phosphor-regulators/src/actions/compare_presence_action.cpp
new file mode 100644
index 0000000..0d3b28d
--- /dev/null
+++ b/phosphor-regulators/src/actions/compare_presence_action.cpp
@@ -0,0 +1,59 @@
+/**
+ * Copyright © 2020 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_presence_action.hpp"
+
+#include "action_error.hpp"
+
+#include <exception>
+#include <ios>
+#include <sstream>
+
+namespace phosphor::power::regulators
+{
+
+bool ComparePresenceAction::execute(ActionEnvironment& environment)
+{
+    bool isEqual{false};
+    try
+    {
+        // Get actual presence value for FRU.
+        bool isPresent =
+            environment.getServices().getPresenceService().isPresent(fru);
+
+        // Check if actual presence value equals expected presence value.
+        isEqual = (isPresent == 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 ComparePresenceAction::toString() const
+{
+    std::ostringstream ss;
+    ss << "compare_presence: { ";
+    ss << "fru: " << fru << ", ";
+    ss << "value: " << std::boolalpha << value << " }";
+
+    return ss.str();
+}
+
+} // namespace phosphor::power::regulators
diff --git a/phosphor-regulators/src/actions/compare_presence_action.hpp b/phosphor-regulators/src/actions/compare_presence_action.hpp
index b2c7880..b16c98f 100644
--- a/phosphor-regulators/src/actions/compare_presence_action.hpp
+++ b/phosphor-regulators/src/actions/compare_presence_action.hpp
@@ -18,8 +18,6 @@
 #include "action.hpp"
 #include "action_environment.hpp"
 
-#include <ios>
-#include <sstream>
 #include <string>
 
 namespace phosphor::power::regulators
@@ -57,16 +55,10 @@
     /**
      * Executes this action.
      *
-     * TODO: Not implemented yet
-     *
      * @param environment Action execution environment.
      * @return true
      */
-    virtual bool execute(ActionEnvironment& /* environment */) override
-    {
-        // TODO: Not implemented yet
-        return true;
-    }
+    virtual bool execute(ActionEnvironment& environment) override;
 
     /**
      * Returns the Field-Replaceable Unit (FRU).
@@ -93,17 +85,7 @@
      *
      * @return description of action
      */
-    virtual std::string toString() const override
-    {
-        std::ostringstream ss;
-        ss << "compare_presence: { ";
-
-        ss << "fru: " << fru << ", ";
-
-        ss << "value: " << std::boolalpha << value << " }";
-
-        return ss.str();
-    }
+    virtual std::string toString() const override;
 
   private:
     /**
diff --git a/phosphor-regulators/src/meson.build b/phosphor-regulators/src/meson.build
index bfcacb1..8238d93 100644
--- a/phosphor-regulators/src/meson.build
+++ b/phosphor-regulators/src/meson.build
@@ -21,6 +21,7 @@
     'system.cpp',
     'temporary_file.cpp',
 
+    'actions/compare_presence_action.cpp',
     'actions/if_action.cpp',
     'actions/i2c_compare_bit_action.cpp',
     'actions/i2c_compare_byte_action.cpp',