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.
