diff --git a/automotive/vehicle/aidl/impl/fake_impl/hardware/include/FakeVehicleHardware.h b/automotive/vehicle/aidl/impl/fake_impl/hardware/include/FakeVehicleHardware.h
index e8da43a..21ca72e 100644
--- a/automotive/vehicle/aidl/impl/fake_impl/hardware/include/FakeVehicleHardware.h
+++ b/automotive/vehicle/aidl/impl/fake_impl/hardware/include/FakeVehicleHardware.h
@@ -253,7 +253,7 @@
             const aidl::android::hardware::automotive::vehicle::SetValueRequest& request);
 
     std::string genFakeDataCommand(const std::vector<std::string>& options);
-    void sendHvacPropertiesCurrentValues(int32_t areaId);
+    void sendHvacPropertiesCurrentValues(int32_t areaId, int32_t hvacPowerOnVal);
     void sendAdasPropertiesState(int32_t propertyId, int32_t state);
     void generateVendorConfigs(
             std::vector<aidl::android::hardware::automotive::vehicle::VehiclePropConfig>&) const;
diff --git a/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp b/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp
index 13c48c6..9868f27 100644
--- a/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp
+++ b/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp
@@ -731,7 +731,7 @@
     return std::move(gotValue);
 }
 
-void FakeVehicleHardware::sendHvacPropertiesCurrentValues(int32_t areaId) {
+void FakeVehicleHardware::sendHvacPropertiesCurrentValues(int32_t areaId, int32_t hvacPowerOnVal) {
     for (size_t i = 0; i < sizeof(HVAC_POWER_PROPERTIES) / sizeof(int32_t); i++) {
         int powerPropId = HVAC_POWER_PROPERTIES[i];
         auto powerPropResults = mServerSidePropStore->readValuesForProperty(powerPropId);
@@ -744,7 +744,8 @@
         for (size_t j = 0; j < powerPropValues.size(); j++) {
             auto powerPropValue = std::move(powerPropValues[j]);
             if ((powerPropValue->areaId & areaId) == powerPropValue->areaId) {
-                powerPropValue->status = VehiclePropertyStatus::AVAILABLE;
+                powerPropValue->status = hvacPowerOnVal ? VehiclePropertyStatus::AVAILABLE
+                                                        : VehiclePropertyStatus::UNAVAILABLE;
                 powerPropValue->timestamp = elapsedRealtimeNano();
                 // This will trigger a property change event for the current hvac property value.
                 mServerSidePropStore->writeValue(std::move(powerPropValue), /*updateStatus=*/true,
@@ -796,13 +797,6 @@
         return setUserHalProp(value);
     }
 
-    if (propId == toInt(VehicleProperty::HVAC_POWER_ON) && value.value.int32Values.size() == 1 &&
-        value.value.int32Values[0] == 1) {
-        // If we are turning HVAC power on, send current hvac property values through on change
-        // event.
-        sendHvacPropertiesCurrentValues(value.areaId);
-    }
-
     if (isHvacPropAndHvacNotAvailable(propId, value.areaId)) {
         *isSpecialValue = true;
         return StatusError(StatusCode::NOT_AVAILABLE_DISABLED) << "hvac not available";
@@ -841,6 +835,16 @@
         case toInt(TestVendorProperty::VENDOR_PROPERTY_FOR_ERROR_CODE_TESTING):
             *isSpecialValue = true;
             return StatusError((StatusCode)VENDOR_ERROR_CODE);
+        case toInt(VehicleProperty::HVAC_POWER_ON):
+            if (value.value.int32Values.size() != 1) {
+                *isSpecialValue = true;
+                return StatusError(StatusCode::INVALID_ARG)
+                       << "HVAC_POWER_ON requires only one int32 value";
+            }
+            // When changing HVAC power state, send current hvac property values
+            // through on change event.
+            sendHvacPropertiesCurrentValues(value.areaId, value.value.int32Values[0]);
+            return {};
         case toInt(VehicleProperty::HVAC_TEMPERATURE_VALUE_SUGGESTION):
             *isSpecialValue = true;
             return setHvacTemperatureValueSuggestion(value);
diff --git a/automotive/vehicle/aidl/impl/fake_impl/hardware/test/FakeVehicleHardwareTest.cpp b/automotive/vehicle/aidl/impl/fake_impl/hardware/test/FakeVehicleHardwareTest.cpp
index 6cc06bc..df1f5bb 100644
--- a/automotive/vehicle/aidl/impl/fake_impl/hardware/test/FakeVehicleHardwareTest.cpp
+++ b/automotive/vehicle/aidl/impl/fake_impl/hardware/test/FakeVehicleHardwareTest.cpp
@@ -35,6 +35,7 @@
 #include <inttypes.h>
 #include <chrono>
 #include <condition_variable>
+#include <memory>
 #include <unordered_map>
 #include <unordered_set>
 #include <vector>
@@ -390,6 +391,25 @@
         }
     } mPropValueCmp;
 
+    std::unique_ptr<VehiclePropConfig> getVehiclePropConfig(int32_t propertyId) {
+        auto configs = mHardware->getAllPropertyConfigs();
+        for (auto& config : configs) {
+            if (config.prop == propertyId) {
+                auto ptr = std::make_unique<VehiclePropConfig>();
+                ptr->prop = config.prop;
+                ptr->access = config.access;
+                ptr->changeMode = config.changeMode;
+                ptr->areaConfigs = config.areaConfigs;
+                ptr->configArray = config.configArray;
+                ptr->configString = config.configString;
+                ptr->minSampleRate = config.minSampleRate;
+                ptr->maxSampleRate = config.maxSampleRate;
+                return ptr;
+            }
+        }
+        return std::unique_ptr<VehiclePropConfig>(nullptr);
+    }
+
   private:
     std::unique_ptr<FakeVehicleHardware> mHardware;
     std::shared_ptr<IVehicleHardware::SetValuesCallback> mSetValuesCallback;
@@ -1755,32 +1775,41 @@
 }
 
 TEST_F(FakeVehicleHardwareTest, testHvacPowerOnSendCurrentHvacPropValues) {
-    int seatAreaIds[5] = {SEAT_1_LEFT, SEAT_1_RIGHT, SEAT_2_LEFT, SEAT_2_CENTER, SEAT_2_RIGHT};
-    for (int areaId : seatAreaIds) {
+    auto hvacPowerOnConfig = std::move(getVehiclePropConfig(toInt(VehicleProperty::HVAC_POWER_ON)));
+    EXPECT_NE(hvacPowerOnConfig, nullptr);
+    for (auto& hvacPowerOnAreaConfig : hvacPowerOnConfig->areaConfigs) {
+        int hvacPowerAreaId = hvacPowerOnAreaConfig.areaId;
         StatusCode status = setValue(VehiclePropValue{.prop = toInt(VehicleProperty::HVAC_POWER_ON),
-                                                      .areaId = areaId,
+                                                      .areaId = hvacPowerAreaId,
                                                       .value.int32Values = {0}});
-
-        ASSERT_EQ(status, StatusCode::OK);
-
-        clearChangedProperties();
-        setValue(VehiclePropValue{.prop = toInt(VehicleProperty::HVAC_POWER_ON),
-                                  .areaId = areaId,
-                                  .value.int32Values = {1}});
-
+        EXPECT_EQ(status, StatusCode::OK);
         auto events = getChangedProperties();
-        // If we turn HVAC power on, we expect to receive one property event for every HVAC prop
-        // areas plus one event for HVAC_POWER_ON.
-        std::vector<int32_t> changedPropIds;
-        for (size_t i = 0; i < sizeof(HVAC_POWER_PROPERTIES) / sizeof(int32_t); i++) {
-            changedPropIds.push_back(HVAC_POWER_PROPERTIES[i]);
-        }
-        changedPropIds.push_back(toInt(VehicleProperty::HVAC_POWER_ON));
-
         for (const auto& event : events) {
-            EXPECT_EQ(event.areaId, areaId);
-            EXPECT_THAT(event.prop, AnyOfArray(changedPropIds));
+            // Ignore HVAC_POWER_ON event
+            if (event.prop == toInt(VehicleProperty::HVAC_POWER_ON)) {
+                continue;
+            }
+            EXPECT_THAT(event.prop, AnyOfArray(HVAC_POWER_PROPERTIES));
+            EXPECT_EQ((hvacPowerAreaId & event.areaId), hvacPowerAreaId);
+            EXPECT_EQ(event.status, VehiclePropertyStatus::UNAVAILABLE);
         }
+        clearChangedProperties();
+
+        status = setValue(VehiclePropValue{.prop = toInt(VehicleProperty::HVAC_POWER_ON),
+                                           .areaId = hvacPowerAreaId,
+                                           .value.int32Values = {1}});
+        EXPECT_EQ(status, StatusCode::OK);
+        events = getChangedProperties();
+        for (const auto& event : events) {
+            // Ignore HVAC_POWER_ON event
+            if (event.prop == toInt(VehicleProperty::HVAC_POWER_ON)) {
+                continue;
+            }
+            EXPECT_THAT(event.prop, AnyOfArray(HVAC_POWER_PROPERTIES));
+            EXPECT_EQ((hvacPowerAreaId & event.areaId), hvacPowerAreaId);
+            EXPECT_EQ(event.status, VehiclePropertyStatus::AVAILABLE);
+        }
+        clearChangedProperties();
     }
 }
 
@@ -3016,13 +3045,8 @@
 
     // Config array values from HVAC_TEMPERATURE_SET in DefaultProperties.json
     auto configs = getHardware()->getAllPropertyConfigs();
-    VehiclePropConfig* hvacTemperatureSetConfig = nullptr;
-    for (auto& config : configs) {
-        if (config.prop == toInt(VehicleProperty::HVAC_TEMPERATURE_SET)) {
-            hvacTemperatureSetConfig = &config;
-            break;
-        }
-    }
+    auto hvacTemperatureSetConfig =
+            std::move(getVehiclePropConfig(toInt(VehicleProperty::HVAC_TEMPERATURE_SET)));
     EXPECT_NE(hvacTemperatureSetConfig, nullptr);
 
     auto& hvacTemperatureSetConfigArray = hvacTemperatureSetConfig->configArray;