Interface Checker 440 Link ((hot)) — Psa

: Connect your PSA diagnostic interface to your computer via USB. Note that you do not need to connect it to the car's OBD-II port just to check or flash firmware.

Typical use cases

Old DiagBox (v5.29) uses a different handshake than newer versions (v7.83). If you update your DiagBox software but fail to update the interface’s firmware, the PSA Interface Checker will report a broken 440 link because the encryption keys no longer match. psa interface checker 440 link