o3DIAG

o3DIAG is a diagnostic application designed to work with OBD-II vehicles through an ELM327 adapter.
It provides an easy way to connect, read vehicle data, and interpret diagnostic trouble codes (DTCs).
Official Website: https://o3diag.openw3rk.de

Main Features
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Connection Control

– Select communication port and baud rate.
– Connect or disconnect the adapter with a single click.
– Initialize the adapter automatically with the required AT commands.

Live Data Reading

– Read common engine parameters such as:
- Engine RPM (PID 010C)
- Vehicle Speed (PID 010D)
- Coolant Temperature (PID 0105)
- Engine Load (PID 0104)
– Raw responses are automatically converted into real-world values (e.g., RPM in revolutions per minute,
temperature in °C, speed in km/h).

Diagnostic Trouble Codes (DTCs)

– Read stored error codes from the engine control unit.
– Clear fault codes when required.
– Codes are translated into plain-text descriptions.