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This article is focused on the most frequently occurring iTunes errors and the best techniques to resolve them. There are four types of errors listed in the article: Communication errors, USB connection errors, Security errors, and Hardware errors. The best troubleshooting solutions are listed after each array of errors. Please leave a comment after the article if you have encountered an iTunes error that is currently not listed. We will try our best to help you troubleshoot the issue.

The most common Communication Errors with the iTunes Update server are listed below. The troubleshooting process for these errors is included under the last error of this type.

Errors
Error 17
Communication Error with iTunes Update server
Error 1004
Communication Error with iTunes Update server
Error 1013
Communication Error with iTunes Update server
Error 1638
Communication Error with iTunes Update server
Error 3014
Communication Error with iTunes Update server
Error 3194
Communication Error with iTunes Update server
Error 3000
Communication Error with iTunes Update server
Error 3002
Communication Error with iTunes Update server
Error 3004
Communication Error with iTunes Update server
Error 3013
Communication Error with iTunes Update server
Error 3014
Communication Error with iTunes Update server
Error 3015
Communication Error with iTunes Update server
Error 3194
Communication Error with iTunes Update server
The message [There was a problem downloading the software] is displayed
The message [The device isn’t eligible for the requested build] is displayed
Error 3200
Communication Error with iTunes Update server

Solutions
1. The most common cause for the above communication problems is an inactive/no internet connection. Thus, you must make sure that your internet connection is enabled, and that you can access the web.
2. The Apple server may be down. That’s highly unlikely, but it is still possible. You can check if the server is online by opening GS.APPLE.COM in your browser.

The most common iTunes security errors are listed below. The best solutions are included after the last error of this type.

Errors
Error 2
Security error
Error 4
Security error
Error 6
Security error
Error 9
Security error
Error 1000
Security error
Error 1611
Security error
Error 9006
Security error
Error 9807
Security error
Error 9844
Security error

Solutions
You have to check the security software packages transferred during the connection. You should also make sure that the proxy server settings and the port information are correct.

All iTunes errors related to the USB connectivity are listed below. The best solutions are provided under the last error of this type.

Errors
Error 13
iTunes USB connection error
Error 14
iTunes USB connection error
Error 1600
iTunes USB connection error
Error 1601
iTunes USB connection error
Error 1602
iTunes USB connection error
Error 1603
iTunes USB connection error
Error 1604
iTunes USB connection error
Error 1611
iTunes USB connection error
Error 1643-1650
iTunes USB connection error
Error 2000
iTunes USB connection error
Error 2001
iTunes USB connection error
Error 2002
iTunes USB connection error
Error 2005
iTunes USB connection error
Error 2006
iTunes USB connection error
Error 2009
iTunes USB connection error
Error 4000
iTunes USB connection error
Error 4005
iTunes USB connection error
Error 4013
iTunes USB connection error
Error 4014
iTunes USB connection error
Error 4016
iTunes USB connection error
The message [invalid response] is displayed

Solutions
1. Check the USB cable for damages, and replace it if necessary.
2. Check the USB hubs (if available) for damages.
3. Check the USB socket of your device for damages.

The most common iTunes related hardware problems and the most appropriate troubleshooting methods are listed below.

Errors
Error 1
iTunes related hardware error
Error 3
iTunes related hardware error
Error 10
iTunes related hardware error
Error 11
iTunes related hardware error
Error 12
iTunes related hardware error
Error 13
iTunes related hardware error
Error 14
iTunes related hardware error
Error 16
iTunes related hardware error
Error 20
iTunes related hardware error
Error 21
iTunes related hardware error
Error 23
iTunes related hardware error
Error 26
iTunes related hardware error
Error 27
iTunes related hardware error
Error 28
iTunes related hardware error
Error 29
iTunes related hardware error
Error 34
iTunes related hardware error
Error 35
iTunes related hardware error
Error 36
iTunes related hardware error
Error 37
iTunes related hardware error
Error 40
iTunes related hardware error
Error 1000
iTunes related hardware error
Error 1002
iTunes related hardware error
Error 1004
iTunes related hardware error
Error 1011
iTunes related hardware error
Error 1012
iTunes related hardware error
Error 1014
iTunes related hardware error
Error 1667
iTunes related hardware error
Error 1669
iTunes related hardware error

Solution
You should check all USB cables, hubs, and sockets for damages. Then, you must make sure that the internet and security settings are correct. If the problem is still present, you should check if the devices are syncing correctly. Please send your device to an authorized repair shop if the above actions do not resolve the issue.