What does it mean?
A test measured emissions or an engine-management-related condition outside the applicable inspection limits. The cause cannot be confirmed from the result alone.
What should I ask a workshop?
Ask a workshop to review the actual readings, diagnostic trouble codes and possible causes before replacing parts.
Safety note
Only an inspection and diagnostics can establish which repair, if any, is necessary.
What about re-inspection?
In Finland, re-inspection is generally required within one month of a failed inspection if you want the defects reviewed without repeating the entire inspection. This does not establish driving permission. Check the actual decision and current official requirements.