# 331
source: https://developer.mastercard.com/open-finance-us/documentation/errors/error-codes/331/index.md

This error occurs when the end user session has either expired or timed out.

|             Title             |                                                                                                       Details                                                                                                       |
|-------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| **Aggregation Status Code**   | 331                                                                                                                                                                                                                 |
| **Remediation Category**      | Re-Authenticate or Provide Additional Information                                                                                                                                                                   |
| **HTTP Status**               | 400                                                                                                                                                                                                                 |
| **Error Type**                | Account Error                                                                                                                                                                                                       |
| **Data Connect Alert**        | Your connection timed out due to inactivity. Please log in again to complete your account linking. (331)​                                                                                                           |
| **Error Message**             | The customer has taken too long to answer an MFA question. This error typically will not appear as we will prompt them to try again before the time runs out. The customer has 5 minutes to answer an MFA question. |
| **Common Causes**             | The error occurs when the end user is not responsive during Multi-factor authentication (MFA).​                                                                                                                     |
| **Troubleshooting Steps**     | Restarting a new Data Connect session is recommended. ​                                                                                                                                                             |
| **Data Connect Fix Eligible** | No.                                                                                                                                                                                                                 |
| **Retriable by End User**     | No.                                                                                                                                                                                                                 |
| **Access to Latest Data**     | You will be unable to access the latest data for this user's account until the issue is resolved.                                                                                                                   |

[Full Error List](https://developer.mastercard.com/open-finance-us/documentation/errors/error-list/index.md) \| [Account Errors](https://developer.mastercard.com/open-finance-us/documentation/errors/account-errors/index.md)