Error code 4000 indicates that something unexpected happened and iTunes could not update your iPhone or iPad. Restarting your iOS device and computer should help you fix the issue. However, if this method doesn’t work, you’ll need to pursue additional troubleshooting steps. Follow the steps below and check if the solutions available in this guide help you fix the problem.
How Do I Fix Error 4000 on iPhone or iPad?
Make sure you’re using the latest iTunes version on your computer. It’s not uncommon for outdated iTunes versions to cause various glitches and bugs.
If you’re on Mac, launch iTunes, go to the iTunes menu, select Help, and Check for Updates. If you’re on Windows, you can check for updates through the Microsoft Store. Launch the Store app, click on More options, go to Downloads and updates, and click on Get updates.
Then update your macOS version. Go to System Preferences, click on System Update and check for updates.
Restart your iOS device and computer. Then plug your iPhone or iPad directly into your computer’s USB port. Don’t use a USB hub, use a direct connection and check the results.
Disable Your Security Software
Update your security apps (antivirus, malware, firewall) and check if error 4000 is gone. Then, if the problem persists, disable your computer’s security programs. The apps and programs running on your computer could be interfering with your iTunes connection.
So, disable your antivirus, and check if iTunes can update your iPhone or iPad. By the way, don’t forget to re-enable your security tools after updating your iOS device.
Put Your iPhone into Recovery Mode
A number of users managed to troubleshoot this problem by putting their iOS devices into Recovery Mode. For step-by-step instructions, see Use Recovery Mode to fix your iPhone, iPad, or iPod touch. Basically, you need to connect your iPhone or iPad to a computer and force restart the device.
Disable the Passcode
Other users said that disabling the passcode option fixed the problem. On your iPhone, go to Settings, and select Touch ID & Passcode. Then scroll down to Turn Passcode Off. Confirm your choice, restart your device, and check the results.
To sum up, error 4000 indicates that iTunes failed to update your iPhone or iPad. To fix this update error, install the latest iTunes and macOS versions on your computer. Additionally, you can also disable your antivirus and put your iOS device in Recovery Mode. If the issue persists, turn off your passcode. Hit the comments below and let us know if error code 4000 is gone.