diff --git a/lib/adapters/http.js b/lib/adapters/http.js
index 0c57c55..aa0cfa2 100755
--- a/lib/adapters/http.js
+++ b/lib/adapters/http.js
@@ -11,8 +11,6 @@ var httpsFollow = require('follow-redirects').https;
 var url = require('url');
 var zlib = require('zlib');
 var VERSION = require('./../env/data').version;
-var createError = require('../core/createError');//
-var enhanceError = require('../core/enhanceError');//
 var defaults = require('../defaults');
 var AxiosError = require('../core/AxiosError');
 var CanceledError = require('../cancel/CanceledError');
@@ -104,7 +102,11 @@ module.exports = function httpAdapter(config) {
       }
 
       if (config.maxBodyLength > -1 && data.length > config.maxBodyLength) {
-        return reject(createError('Request body larger than maxBodyLength limit', config));
+        return reject(new AxiosError(
+          'Request body larger than maxBodyLength limit',
+          AxiosError.ERR_BAD_REQUEST,
+          config
+        ));
       }
 
       // Add Content-Length header if data exists
@@ -126,12 +128,12 @@ module.exports = function httpAdapter(config) {
     var parsed = url.parse(fullPath);
     var protocol = utils.getProtocol(parsed.protocol);
 
-    if (parsed.path === null) {
-      return reject(createError('Malformed URL ' + fullPath, config));
-    }
-
     if (!utils.supportedProtocols.includes(protocol)) {
-      return reject(createError('Unsupported protocol ' + protocol, config));
+      return reject(new AxiosError(
+        'Unsupported protocol ' + protocol,
+        AxiosError.ERR_BAD_REQUEST,
+        config
+      ));
     }
 
     if (!auth && parsed.auth) {
@@ -311,7 +313,12 @@ module.exports = function httpAdapter(config) {
             return;
           }
           stream.destroy();
-          reject(createError('error request aborted', config, 'ERR_REQUEST_ABORTED', lastRequest));
+          reject(new AxiosError(
+            'maxContentLength size of ' + config.maxContentLength + ' exceeded',
+            AxiosError.ERR_BAD_RESPONSE,
+            config,
+            lastRequest
+          ));
         });
 
         stream.on('error', function handleStreamError(err) {
@@ -330,7 +337,7 @@ module.exports = function httpAdapter(config) {
             }
             response.data = responseData;
           } catch (err) {
-            reject(enhanceError(err, config, err.code, response.request, response));
+            reject(AxiosError.from(err, null, config, response.request, response));
           }
           settle(resolve, reject, response);
         });
diff --git a/lib/adapters/xhr.js b/lib/adapters/xhr.js
index 253b695..1fe7be3 100644
--- a/lib/adapters/xhr.js
+++ b/lib/adapters/xhr.js
@@ -7,7 +7,6 @@ var buildURL = require('./../helpers/buildURL');
 var buildFullPath = require('../core/buildFullPath');
 var parseHeaders = require('./../helpers/parseHeaders');
 var isURLSameOrigin = require('./../helpers/isURLSameOrigin');
-var createError = require('../core/createError');//
 var url = require('url');
 var transitionalDefaults = require('../defaults/transitional');
 var AxiosError = require('../core/AxiosError');
@@ -212,12 +211,12 @@ module.exports = function xhrAdapter(config) {
     }
 
     if (parsed.path === null) {
-      reject(createError('Malformed URL ' + fullPath, config));
+      reject(new AxiosError('Malformed URL ' + fullPath, AxiosError.ERR_BAD_REQUEST, config));
       return;
     }
 
     if (!utils.supportedProtocols.includes(protocol)) {
-      reject(createError('Unsupported protocol ' + protocol, config));
+      reject(new AxiosError('Unsupported protocol ' + protocol, AxiosError.ERR_BAD_REQUEST, config));
       return;
     }