diff --git a/dom/bluetooth/BluetoothHfpManager.cpp b/dom/bluetooth/BluetoothHfpManager.cpp
index 4a1061f1c06..2238caeeb06 100644
--- a/dom/bluetooth/BluetoothHfpManager.cpp
+++ b/dom/bluetooth/BluetoothHfpManager.cpp
@@ -1026,15 +1026,22 @@ BluetoothHfpManager::Connect(const nsAString& aDeviceAddress,
 {
   MOZ_ASSERT(NS_IsMainThread());
 
-  NS_ENSURE_FALSE_VOID(gInShutdown);
-  NS_ENSURE_FALSE_VOID(mSocket);
+  BluetoothService* bs = BluetoothService::Get();
+  if (!bs || gInShutdown) {
+    DispatchBluetoothReply(aRunnable, BluetoothValue(),
+                           NS_LITERAL_STRING(ERR_NO_AVAILABLE_RESOURCE));
+    return;
+  }
+
+  if (mSocket) {
+    DispatchBluetoothReply(aRunnable, BluetoothValue(),
+                           NS_LITERAL_STRING(ERR_REACHED_CONNECTION_LIMIT));
+    return;
+  }
 
   mNeedsUpdatingSdpRecords = true;
   mIsHandsfree = aIsHandsfree;
 
-  BluetoothService* bs = BluetoothService::Get();
-  NS_ENSURE_TRUE_VOID(bs);
-
   nsString uuid;
   if (aIsHandsfree) {
     BluetoothUuidHelper::GetString(BluetoothServiceClass::HANDSFREE, uuid);
diff --git a/dom/bluetooth/BluetoothOppManager.cpp b/dom/bluetooth/BluetoothOppManager.cpp
index a8ef8f4f6b4..6ec66e19a37 100644
--- a/dom/bluetooth/BluetoothOppManager.cpp
+++ b/dom/bluetooth/BluetoothOppManager.cpp
@@ -257,10 +257,18 @@ BluetoothOppManager::Connect(const nsAString& aDeviceAddress,
 {
   MOZ_ASSERT(NS_IsMainThread());
 
-  NS_ENSURE_FALSE_VOID(mSocket);
-
   BluetoothService* bs = BluetoothService::Get();
-  NS_ENSURE_TRUE_VOID(bs);
+  if (!bs || sInShutdown) {
+    DispatchBluetoothReply(aRunnable, BluetoothValue(),
+                           NS_LITERAL_STRING(ERR_NO_AVAILABLE_RESOURCE));
+    return;
+  }
+
+  if (mSocket) {
+    DispatchBluetoothReply(aRunnable, BluetoothValue(),
+                           NS_LITERAL_STRING(ERR_REACHED_CONNECTION_LIMIT));
+    return;
+  }
 
   mNeedsUpdatingSdpRecords = true;
 
diff --git a/dom/bluetooth/BluetoothProfileManagerBase.h b/dom/bluetooth/BluetoothProfileManagerBase.h
index 0e3d5fd027c..ae79508cdd9 100644
--- a/dom/bluetooth/BluetoothProfileManagerBase.h
+++ b/dom/bluetooth/BluetoothProfileManagerBase.h
@@ -8,6 +8,8 @@
 #define mozilla_dom_bluetooth_bluetoothprofilemanagerbase_h__
 
 #define ERR_SERVICE_CHANNEL_NOT_FOUND "DeviceChannelRetrievalError"
+#define ERR_REACHED_CONNECTION_LIMIT "ReachedConnectionLimitError"
+#define ERR_NO_AVAILABLE_RESOURCE "NoAvailableResourceError"
 
 #include "BluetoothCommon.h"