Psa+interface+checker+440+2021 |top| Jun 2026

: Used to "unblock" or reflash interfaces that have been blacklisted by newer software versions or failed updates. Usage Context PSA interface differences - CarTechnoloGY

Modern PSA platforms limit one set of credentials to a single active session. If an admin logs into the same service account via a UI while the interface checker is running, the checker’s session is invalidated → error 440. psa+interface+checker+440+2021

correctly and that no other diagnostic software is open in the background. Reference B vs C: : Used to "unblock" or reflash interfaces that