Look for the . If it shows 921815C/ , you have the coveted "440" compatible hardware. Troubleshooting Common Issues
If you’re working with vehicles (Peugeot, Citroën, DS, or Opel/Vauxhall), you’ve likely encountered the complexity of diagnostic hardware. When it comes to the Lexia 3 / PP2000 or Diagbox systems, the "440" designation is the gold standard.
For any serious DIY mechanic or independent shop, the status is the benchmark for reliability. It ensures that your Diagbox installation remains stable and that you can perform advanced functions like telecoding , ECU flashing, and key programming without the risk of a connection drop. psa interface checker 440 verified
The Interface Checker is a small utility program used to communicate with your (Vehicle Communication Interface). Its primary job is to identify the hardware version and the firmware version currently flashed onto your device.
Since Peugeot and Citroën frequently update their official software, the hardware needs to be "seen" as authentic and up-to-date to function correctly. The "440" Signature: Why It Matters Look for the
It can be flashed with the latest firmware (e.g., 4.3.7) without "bricking" or being blocked by Diagbox.
It allows you to diagnose vehicles produced after 2016, which often require the specific "C" revision handshake to access all ECUs. How to Use the Interface Checker When it comes to the Lexia 3 /
You might find many Lexia 3 cables online, but not all are created equal. A unit ensures:
It contains all the necessary optocouplers and relays (usually 12 or more) required for stable communication.
In the world of PSA diagnostics, "440" refers to the specific hardware revision—specifically the .