QuickBooks Error OL 231: Causes, Fixes, and Expert Help

QuickBooks Error OL 231 occurs when users try to connect QuickBooks to their bank for online banking services and the connection request is rejected. This error generally arises due to incorrect bank login settings, outdated QuickBooks software, or issues on the bank’s end. It prevents users from downloading transactions or syncing account data.

This article provides a structured overview of the error, its possible causes, identification steps, detailed troubleshooting solutions, and expert assistance options. Whether you’re a small business or an accountant, this guide helps you fix Error OL 231 efficiently.

Watch this quick video to learn the causes and solutions for QuickBooks Error OL-231.

What is QuickBooks Error “OL 231”?

QuickBooks Error OL 231 is a bank connection issue that appears during online banking updates. The error code indicates a disruption in communication between QuickBooks and your bank’s server. It typically displays the message:

“QuickBooks was not able to complete your request. Your financial institution returned an error code OL-231.”

This issue directly impacts the ability to download bank transactions and may affect your account reconciliation if not addressed promptly.

Why does QuickBooks Error “OL 231” occur?

QuickBooks Error OL 231 can result from several technical or financial institution-side issues. The most common reasons include:

• Outdated QuickBooks Desktop version
• Incorrect or outdated bank login credentials
• Connection interruption due to bank server maintenance or changes
• Damaged company file or incorrect format in the online banking setup
• Unsupported QuickBooks connection methods (such as Direct Connect or Web Connect)

How can you identify QuickBooks Error “OL 231”?

You can identify QuickBooks Error OL 231 by the following signs:

• Error code OL 231 message appears while updating bank feeds
• Online banking transactions do not download
• QuickBooks freezes or slows down during the sync process
• A message from your financial institution referencing a rejected request

Always check whether your bank recently made any changes to its connection policy or format that QuickBooks needs to align with.

What are the steps to fix QuickBooks Error “OL 231”?

Several methods can help resolve QuickBooks Error OL 231. Start with basic checks and progress toward more technical solutions.

Solution 1: Update QuickBooks Desktop to the Latest Version

An outdated QuickBooks version may not support current banking protocols. Follow these steps:

1. Open QuickBooks Desktop.
2. Go to Help > Update QuickBooks Desktop.
3. Click Update Now, then select Get Updates.
4. Restart QuickBooks once the update completes.

Try connecting your bank again to see if the error persists.

Solution 2: Verify Bank Login Credentials and Website Access

Invalid credentials or expired passwords can cause Error OL 231. To verify:

1. Visit your bank’s official website.
2. Log in using the credentials used in QuickBooks.
3. If login is successful, check for account notifications or required verifications.
4. If you face issues logging in, reset the password and update the same in QuickBooks.

Solution 3: Switch to Classic Mode in Bank Feeds

QuickBooks sometimes faces issues in Express Mode. Switching to Classic Mode can help:

1. Go to Edit > Preferences > Checking.
2. Click the Bank Feeds tab.
3. Select Classic Mode (Register Mode).
4. Click OK to save changes.

Re-attempt the online banking connection.

Solution 4: Create a Test Company File

Creating a test file helps determine whether the issue is specific to your company file:

1. Go to File > New Company > Start Setup.
2. Enter the required test company details.
3. Try connecting the same bank account in the test file.
4. If successful, your original company file might be damaged.

Use File Doctor or restore a recent backup if this is the case.

Solution 5: Contact Your Bank

If QuickBooks and credentials are working, the issue could lie with your financial institution:

• Contact your bank’s support team.
• Verify if their systems are compatible with QuickBooks.
• Confirm if there are known outages, upgrades, or account changes.

Is there an automated tool to fix QuickBooks Error “OL 231”?

Yes, QuickBooks Tool Hub includes utilities like File Doctor and Connection Diagnostic Tool that can automatically identify and fix some of the common causes behind OL 231. Download the latest version of QuickBooks Tool Hub from Intuit’s official website, install it, and run the Company File Issues or Network Issues tool as appropriate.

How can I prevent QuickBooks Error “OL 231” in the future?

To prevent this error:

• Always use the latest version of QuickBooks Desktop.
• Regularly verify and update your bank login credentials.
• Back up your QuickBooks company file before online banking updates.
• Ensure your bank still supports the online connection method you’re using.
• Use only verified bank feeds and formats.

Maintaining clean and updated configurations significantly reduces the chance of connectivity errors.

What if QuickBooks Error “OL 231” is not fixed after troubleshooting?

If the error continues after following all recommended steps, the issue may involve a deeper software problem or a configuration conflict with your bank. This requires more advanced diagnostic support from professionals familiar with QuickBooks software and bank integration protocols.

How can our experts assist you in resolving QuickBooks Error “OL 231”?

If QuickBooks Error OL 231 still remains unresolved, our certified experts at Error Code Experts are ready to help. We specialize in diagnosing and fixing complex QuickBooks errors like OL 231.

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