Psa Interface Driver: Actia

The Actia PSA Interface, commonly known as the XS Evolution or Lexia 3, is a professional-grade diagnostic tool used to communicate with electronic control units (ECUs) in Peugeot, Citroën, DS, and recent Vauxhall vehicles. The "driver" refers to the software bridge that allows a Windows PC to recognize the hardware via USB to perform diagnostics, coding, and ECU reprogramming. 1. Hardware Overview

Disconnect Internet: To prevent Windows Update from automatically installing a generic (and often non-functional) driver, stay offline. 3. Step-by-Step Driver Installation actia psa interface driver

Typical usage scenarios

• Workshop diagnostics: Read/clear DTCs, view live parameters, perform guided tests.
• ECU configuration: Read/write DIDs to change options, perform adaptations after part replacement.
• Software updates: Flash new firmware or calibrations to ECUs during service campaigns.
• Development and reverse engineering: Capture and replay traffic, analyze PSA-specific services for research or tool development.

1. Device Manager > Actia interface > Properties > Driver tab.
2. Click Roll Back Driver.
3. If grayed out, uninstall the device (check "Delete driver software") and reinstall the known-good version.