GA4 Stopped Working (What Broke and How to Fix It)

When GA4 suddenly stops working, it’s almost never random.

Something changed.

Tracking failures usually follow:

• A theme or plugin update
• A Google Tag Manager modification
• Consent banner installation
• Migration from Universal Analytics
• Manual code edits
• Hosting or caching changes

GA4 does not “break” on its own. Configuration changes break it.

If you’re unsure where the tracking break occurs:

→ Run Free GA4 Diagnostic

What “Stopped Working” Actually Means

It usually appears as:

• Sessions drop to zero
• Events disappear
• Conversions stop recording
• DebugView shows nothing
• Only page_view works

Different symptoms point to different failure layers.

Where the Break Usually Happens

1) Tracking script removed or duplicated

• Theme update removed gtag or GTM snippet
• Plugin deactivated
• Multiple GA4 installs conflicting

2) Consent mode change

• analytics_storage now denied
• Consent timing changed
• Tags fire before consent update

3) GTM container change

• Trigger edited
• Tag removed
• Container unpublished

4) Wrong property or stream

• Measurement ID mismatch
• Events sent to different GA4 property

If the cause isn’t obvious, Run Free GA4 Diagnostic and identify where tracking breaks between Shopify, GTM, and GA4.

Quick Triage

1. Check if page_view fires
2. Check GTM preview
3. Check DebugView
4. Confirm Measurement ID
5. Confirm consent state

From there, you isolate the failure layer.

If the Break Is Event-Specific

If events stopped but page views still work, see:

• GA4 Events Not Firing

If GTM triggers never activate, see:

• Google Tag Manager Not Firing Tags

Not sure what’s broken?

Run a quick GA4 tracking diagnostic to identify the issue.

Run Free GA4 Diagnostic

Diagnostic fee is credited toward repair if you proceed.