Diagbox 9.186 for PSA Vehicles
DiagBox 9.186 is one of the latest versions (as of mid-2025) of the official diagnostic software developed by PSA Group (now part of Stellantis) for Peugeot, Citroën, DS Automobiles, and in some cases Opel vehicles (especially after the PSA-Opel merger).
It replaced the older separate programs Lexia (for Citroën) and PP2000 / Planet (for Peugeot), combining everything into a single platform.
Main Purpose and Supported Vehicles
Dealer-level diagnostics and maintenance tool.
Covers almost all PSA/Stellantis passenger cars and light commercial vehicles.
Vehicle coverage generally extends up to models from 2025 (typically up to around April–May 2025 depending on the exact patch level).
Key Features
Read and clear fault codes (DTCs) from all control units
Live data monitoring (engine speed, temperatures, sensor values, etc.) – can be displayed as graphs or multiple parameters simultaneously
Actuator tests and component activation
Service functions — oil reset, brake bleeding, battery registration, DPF regeneration, AdBlue reset, etc.
ECU identification, version information and parameter reading
Guided diagnostics and trouble-shooting procedures
Maintenance plans and service interval resets
Multi-language support (usually 20+ languages)
Compatible with Lexia-3 / Lexia XS / PP2000 style interfaces (the classic PSA 16-pin or 30-pin cables)
Function | Older models (~2015 and earlier) | Newer models (~2016–2024) |
Read / Clear Fault Codes | Fully offline | Fully offline |
Live Data / Measuring Values | Fully offline | Fully offline |
Actuator Tests | Mostly offline | Mostly offline |
Service Resets (DPF, Oil, etc.) | Usually offline | Usually offline |
ECU Configuration / Telecoding | Often offline | Usually online only |
Key Programming / BSI Flash | Varies – often limited | Usually online only |
Newest vehicle support | Good up to ~2025 | Good up to ~2025 |
In short: DiagBox 9.186 remains one of the best and most up-to-date versions for reading codes, monitoring live data, and performing most service/maintenance operations on Peugeot, Citroën and DS vehicles up to 2025 — especially if you mainly need diagnostics and not deep programming/telecoding on very recent models. For full dealer-level programming on newer cars, official access (paid) is usually required.
