Meta Pixel and Conversions API Problems and Fixes

Pixel events that don't fire, purchases that report without value, duplicate server events and Conversions API errors. Each page explains what Meta's tools are telling you, why it happens and how to fix it, with every step checked against Meta's own documentation.

10 fixes · Last checked 6 October 2026 against Meta's documentation · All platforms

Account issues

Facebook Pixel Domain Blocked: Why It Happens and What to CheckData loss

Tracking

Facebook Advanced Matching Not Working: Causes and FixesData lossFacebook Conversions API Duplicate Events: Why They Happen and How to Fix ThemData lossFacebook Conversions API Not Working: Token, Errors and RetriesData lossFacebook Event Match Quality Low: Why It Happens and How to Improve ItWasted spendFacebook Pixel Duplicate Purchase Events: Find the Source and Fix ItData lossFacebook Pixel Event Showing as Custom Event: Why and How to Fix ItData lossFacebook Pixel Not Firing: How to Find the Cause and Fix ItData lossFacebook Pixel Not Working in Google Tag Manager: What to CheckData lossFacebook Pixel Purchase Value Missing: Why It Happens and How to Fix ItData loss