diff --git a/src/pivx-cli.cpp b/src/pivx-cli.cpp
index 7b2f0d117af05..ce15f3a8629db 100644
--- a/src/pivx-cli.cpp
+++ b/src/pivx-cli.cpp
@@ -276,6 +276,18 @@ int CommandLineRPC(int argc, char* argv[])
                         throw CConnectionFailed("server in warmup");
                     strPrint = "error: " + error.write();
                     nRet = abs(code);
+                    if (error.isObject()) {
+                        UniValue errCode = find_value(error, "code");
+                        UniValue errMsg  = find_value(error, "message");
+                        strPrint = errCode.isNull() ? "" : "error code: "+errCode.getValStr()+"\n";
+
+                        if (errMsg.isStr())
+                            strPrint += "error message:\n"+errMsg.get_str();
+
+                        if (errCode.isNum() && errCode.get_int() == RPC_WALLET_NOT_SPECIFIED) {
+                            strPrint += "\nTry adding \"-rpcwallet=<filename>\" option to pivx-cli command line.";
+                        }
+                    }
                 } else {
                     // Result
                     if (result.isNull())
diff --git a/src/rpc/protocol.h b/src/rpc/protocol.h
index 84cedade73471..11c6c411aae45 100644
--- a/src/rpc/protocol.h
+++ b/src/rpc/protocol.h
@@ -76,6 +76,8 @@ enum RPCErrorCode {
     RPC_WALLET_WRONG_ENC_STATE          = -15, //! Command given in wrong wallet encryption state (encrypting an encrypted wallet etc.)
     RPC_WALLET_ENCRYPTION_FAILED        = -16, //! Failed to encrypt the wallet
     RPC_WALLET_ALREADY_UNLOCKED         = -17, //! Wallet is already unlocked
+    RPC_WALLET_NOT_FOUND                = -18, //!< Invalid wallet specified
+    RPC_WALLET_NOT_SPECIFIED            = -19, //!< No wallet specified (error when there are multiple wallets loaded)
 };
 
 UniValue JSONRPCRequestObj(const std::string& strMethod, const UniValue& params, const UniValue& id);
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index e0862bff5b698..b1a2ecf7f9ac1 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -46,7 +46,7 @@ CWallet* GetWalletForJSONRPCRequest(const JSONRPCRequest& request)
                 return pwallet;
             }
         }
-        throw JSONRPCError(RPC_INVALID_PARAMETER, "Requested wallet does not exist or is not loaded");
+        throw JSONRPCError(RPC_WALLET_NOT_FOUND, "Requested wallet does not exist or is not loaded");
     }
     return ::vpwallets.size() == 1 || (request.fHelp && ::vpwallets.size() > 0) ? ::vpwallets[0] : nullptr;
 }
@@ -58,13 +58,14 @@ std::string HelpRequiringPassphrase(CWallet* const pwallet)
 
 bool EnsureWalletIsAvailable(CWallet* const pwallet, bool avoidException)
 {
-    if (!pwallet) {
-        if (!avoidException)
-            throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Method not found (wallet disabled)");
-        else
-            return false;
+    if (pwallet) return true;
+    if (avoidException) return false;
+    if (::vpwallets.empty()) {
+        // Wallet RPC methods are disabled if no wallets are loaded.
+        throw JSONRPCError(RPC_METHOD_NOT_FOUND, "Method not found (disabled)");
     }
-    return true;
+    throw JSONRPCError(RPC_WALLET_NOT_SPECIFIED,
+        "Wallet file not specified (must request wallet RPC through /wallet/<filename> uri-path).");
 }
 
 void EnsureWalletIsUnlocked(CWallet* const pwallet, bool fAllowAnonOnly)
diff --git a/test/functional/wallet_multiwallet.py b/test/functional/wallet_multiwallet.py
index 39c37cf18ba1b..317789f5cc1bf 100755
--- a/test/functional/wallet_multiwallet.py
+++ b/test/functional/wallet_multiwallet.py
@@ -101,15 +101,10 @@ def run_test(self):
         w1.generate(1)
 
         # accessing invalid wallet fails
-        assert_raises_rpc_error(-8, "Requested wallet does not exist or is not loaded", wallet_bad.getwalletinfo)
+        assert_raises_rpc_error(-18, "Requested wallet does not exist or is not loaded", wallet_bad.getwalletinfo)
 
         # accessing wallet RPC without using wallet endpoint fails
-        assert_raises_rpc_error(-32601, "Method not found", self.nodes[0].getwalletinfo)
-        # !TODO: backport bitcoin#11970
-        #assert_raises_rpc_error(-19, "Wallet file not specified", node.getwalletinfo)
-
-        # !TODO: backport bitcoin#11473
-        # to un-comment wallet-name checks
+        assert_raises_rpc_error(-19, "Wallet file not specified", node.getwalletinfo)
 
         # check w1 wallet balance
         w1_info = w1.getwalletinfo()