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 e515bad..eac1ffa 100644
--- a/automotive/vehicle/aidl/impl/fake_impl/hardware/include/FakeVehicleHardware.h
+++ b/automotive/vehicle/aidl/impl/fake_impl/hardware/include/FakeVehicleHardware.h
@@ -194,7 +194,7 @@
             const aidl::android::hardware::automotive::vehicle::VehiclePropValue& value) const;
     ValueResultType getEchoReverseBytes(
             const aidl::android::hardware::automotive::vehicle::VehiclePropValue& value) const;
-    bool isHvacPropAndHvacNotAvailable(int32_t propId);
+    bool isHvacPropAndHvacNotAvailable(int32_t propId) const;
 
     std::unordered_map<int32_t, ConfigDeclaration> loadConfigDeclarations();
 
@@ -236,6 +236,7 @@
             const aidl::android::hardware::automotive::vehicle::SetValueRequest& request);
 
     std::string genFakeDataCommand(const std::vector<std::string>& options);
+    void sendHvacPropertiesCurrentValues();
 
     static aidl::android::hardware::automotive::vehicle::VehiclePropValue createHwInputKeyProp(
             aidl::android::hardware::automotive::vehicle::VehicleHwKeyInputAction action,
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 dd76524..4115c11 100644
--- a/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp
+++ b/automotive/vehicle/aidl/impl/fake_impl/hardware/src/FakeVehicleHardware.cpp
@@ -295,7 +295,7 @@
     return {};
 }
 
-bool FakeVehicleHardware::isHvacPropAndHvacNotAvailable(int32_t propId) {
+bool FakeVehicleHardware::isHvacPropAndHvacNotAvailable(int32_t propId) const {
     std::unordered_set<int32_t> powerProps(std::begin(HVAC_POWER_PROPERTIES),
                                            std::end(HVAC_POWER_PROPERTIES));
     if (powerProps.count(propId)) {
@@ -366,6 +366,11 @@
         return getUserHalProp(value);
     }
 
+    if (isHvacPropAndHvacNotAvailable(propId)) {
+        *isSpecialValue = true;
+        return StatusError(StatusCode::NOT_AVAILABLE) << "hvac not available";
+    }
+
     switch (propId) {
         case OBD2_FREEZE_FRAME:
             *isSpecialValue = true;
@@ -408,6 +413,27 @@
     return std::move(gotValue);
 }
 
+void FakeVehicleHardware::sendHvacPropertiesCurrentValues() {
+    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);
+        if (!powerPropResults.ok()) {
+            ALOGW("failed to get power prop 0x%x, error: %s", powerPropId,
+                  getErrorMsg(powerPropResults).c_str());
+            continue;
+        }
+        auto& powerPropValues = powerPropResults.value();
+        for (size_t j = 0; j < powerPropValues.size(); j++) {
+            auto powerPropValue = std::move(powerPropValues[j]);
+            powerPropValue->status = VehiclePropertyStatus::AVAILABLE;
+            powerPropValue->timestamp = elapsedRealtimeNano();
+            // This will trigger a property change event for the current hvac property value.
+            mServerSidePropStore->writeValue(std::move(powerPropValue), /*updateStatus=*/true,
+                                             VehiclePropertyStore::EventMode::ALWAYS);
+        }
+    }
+}
+
 VhalResult<void> FakeVehicleHardware::maybeSetSpecialValue(const VehiclePropValue& value,
                                                            bool* isSpecialValue) {
     *isSpecialValue = false;
@@ -419,6 +445,13 @@
         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();
+    }
+
     if (isHvacPropAndHvacNotAvailable(propId)) {
         *isSpecialValue = true;
         return StatusError(StatusCode::NOT_AVAILABLE) << "hvac not available";
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 0184462..08de312 100644
--- a/automotive/vehicle/aidl/impl/fake_impl/hardware/test/FakeVehicleHardwareTest.cpp
+++ b/automotive/vehicle/aidl/impl/fake_impl/hardware/test/FakeVehicleHardwareTest.cpp
@@ -61,6 +61,7 @@
 using ::android::base::ScopedLockAssertion;
 using ::android::base::StringPrintf;
 using ::android::base::unexpected;
+using ::testing::AnyOfArray;
 using ::testing::ContainerEq;
 using ::testing::ContainsRegex;
 using ::testing::Eq;
@@ -1140,6 +1141,71 @@
     EXPECT_EQ(getValueResult.error(), StatusCode::NOT_AVAILABLE);
 }
 
+TEST_F(FakeVehicleHardwareTest, testGetHvacPropNotAvailable) {
+    StatusCode status = setValue(VehiclePropValue{.prop = toInt(VehicleProperty::HVAC_POWER_ON),
+                                                  .areaId = HVAC_ALL,
+                                                  .value.int32Values = {0}});
+
+    ASSERT_EQ(status, StatusCode::OK);
+
+    for (size_t i = 0; i < sizeof(HVAC_POWER_PROPERTIES) / sizeof(int32_t); i++) {
+        int powerPropId = HVAC_POWER_PROPERTIES[i];
+        auto getValueResult = getValue(VehiclePropValue{
+                .prop = powerPropId,
+                .areaId = HVAC_ALL,
+        });
+
+        EXPECT_FALSE(getValueResult.ok());
+        EXPECT_EQ(getValueResult.error(), StatusCode::NOT_AVAILABLE);
+    }
+}
+
+TEST_F(FakeVehicleHardwareTest, testSetHvacPropNotAvailable) {
+    StatusCode status = setValue(VehiclePropValue{.prop = toInt(VehicleProperty::HVAC_POWER_ON),
+                                                  .areaId = HVAC_ALL,
+                                                  .value.int32Values = {0}});
+
+    ASSERT_EQ(status, StatusCode::OK);
+
+    for (size_t i = 0; i < sizeof(HVAC_POWER_PROPERTIES) / sizeof(int32_t); i++) {
+        int powerPropId = HVAC_POWER_PROPERTIES[i];
+        status = setValue(VehiclePropValue{
+                .prop = powerPropId,
+                .areaId = HVAC_ALL,
+        });
+
+        EXPECT_EQ(status, StatusCode::NOT_AVAILABLE);
+    }
+}
+
+TEST_F(FakeVehicleHardwareTest, testHvacPowerOnSendCurrentHvacPropValues) {
+    StatusCode status = setValue(VehiclePropValue{.prop = toInt(VehicleProperty::HVAC_POWER_ON),
+                                                  .areaId = HVAC_ALL,
+                                                  .value.int32Values = {0}});
+
+    ASSERT_EQ(status, StatusCode::OK);
+
+    clearChangedProperties();
+
+    status = setValue(VehiclePropValue{.prop = toInt(VehicleProperty::HVAC_POWER_ON),
+                                       .areaId = HVAC_ALL,
+                                       .value.int32Values = {1}});
+
+    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));
+    ASSERT_EQ(events.size(), changedPropIds.size());
+    for (const auto& event : events) {
+        EXPECT_EQ(event.areaId, HVAC_ALL);
+        EXPECT_THAT(event.prop, AnyOfArray(changedPropIds));
+    }
+}
+
 TEST_F(FakeVehicleHardwareTest, testGetUserPropertySetOnly) {
     for (VehicleProperty prop : std::vector<VehicleProperty>({
                  VehicleProperty::INITIAL_USER_INFO,