> ## Documentation Index
> Fetch the complete documentation index at: https://docs.upstackdata.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Diagnostics Count: Active Event Setup Issues

> Track the number of active diagnostic issues Meta has flagged with your event setup. Resolve issues to improve your EMQ score and attribution quality.

<Tip>
  Diagnostics Count shows how many active issues Meta has flagged with your event setup that may reduce your EMQ score and attribution quality.
</Tip>

## Formula

<Info>
  **Diagnostics Count** = **COUNT** ( Active Diagnostic Issues )
</Info>

| Metadata        |                                   |
| --------------- | --------------------------------- |
| **Type**        | Number                            |
| **Data Source** | [Meta Ads](/sources/facebook-ads) |
| **Aggregation** | Count                             |

***

## Example

**Your pixel has 3 active diagnostic issues** flagged by Meta this week.

| Issue                          | Severity | Impact          |
| ------------------------------ | -------- | --------------- |
| Missing external\_id parameter | High     | −0.8 EMQ points |
| Invalid phone format           | Medium   | −0.3 EMQ points |
| Low email coverage             | Low      | −0.2 EMQ points |

Resolving all three issues could improve your EMQ score by up to 1.3 points.

***

## How It Works

Meta continuously monitors your Conversions API event data and flags issues that affect matching quality. Each diagnostic issue identifies a specific problem—like missing parameters, invalid formatting, or low coverage—that prevents Meta from matching events to users. Upstack syncs these diagnostics daily from Meta's Events Manager API.

***

## When to Use

| Scenario                 | Action                                               |
| ------------------------ | ---------------------------------------------------- |
| EMQ score dropped        | Check diagnostics for new issues causing the decline |
| Setting up a new pixel   | Monitor diagnostics during initial configuration     |
| Poor attribution results | Prioritize high-severity diagnostics first           |
| Weekly health check      | Review and resolve any new flagged issues            |

***

## Related Metrics

| Metric                                                                   | Relationship                                            |
| ------------------------------------------------------------------------ | ------------------------------------------------------- |
| [EMQ Score](/reference/metrics/data-quality/emq/emq-score)               | Each diagnostic issue can reduce your overall EMQ score |
| [Match Key Issues](/reference/metrics/data-quality/emq/match-key-issues) | Specific match key problems that appear as diagnostics  |

[See all EMQ metrics →](/reference/metrics/data-quality/emq)