Facebook pixel Missing Purchase Value Parameter

Technical Q&A

Topic summary

Multiple Shopify store owners are experiencing persistent Facebook Pixel errors showing “Missing AddToCart Value Parameter” and “Missing Purchase Value Parameter” in Facebook Events Manager.

Core Problem:

  • The errors cause inaccurate conversion reporting in Facebook Ads Manager
  • Reported values either show absurdly high numbers that don’t match actual sales, or display $0 for legitimate purchases
  • The issue has been occurring for several months across numerous stores

Attempted Solutions:

  • Original poster contacted both Shopify and Facebook support with no resolution
  • One user (@Shop_Lovers) offered to help multiple people privately but no public solution was shared
  • One participant (@TomashMartiny) reported the issue resolved itself after 2+ months, suggesting it may have been a platform-level bug

Current Status:

  • The discussion remains unresolved with 30+ users reporting identical problems
  • No verified fix has been publicly documented
  • Participants continue requesting help, with some mentioning the errors affect multiple client stores
  • The thread includes screenshots showing the specific error messages in Facebook Events Manager
Summarized with AI on November 1. AI used: claude-sonnet-4-5-20250929.
15

Hi Guys!

I tried all the options (free) and supports that I was able to find online and nobody was able to help me.

After a bit more than 2 months, I no longer detect the issue. It looks like there was a bug on facebook or shopify side and they managed to fix it.

Screen Shot 2022-12-06 at 3.51.29 PM.jpg
Screen Shot 2022-12-06 at 3.51.29 PM.jpg2234×1010 147 KB