OBD2UDS - Car Diagnostic Pro

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About this app

OBD2UDS is a car diagnostic app for drivers, DIY repair users and mechanics who want more than a basic check engine code reader.

Connect a compatible ELM327 Bluetooth OBD2 adapter and turn your Android phone into an OBD2 scanner, live data dashboard and advanced UDS diagnostic tool for supported vehicles.

Main diagnostic features
- Read and clear engine fault codes
- View freeze frame and live sensor data
- Monitor RPM, coolant temperature, speed, engine load, fuel trims and more
- Check I/M readiness before an emissions test or smog check
- Use Mode 06 data to find misfires, sensor issues and borderline test results
- Capture oxygen sensor voltage waveforms to help check catalytic converter performance
- Read vehicle and ECU information, including VIN when supported

Advanced UDS diagnostics
For supported vehicles and control modules, OBD2UDS can go beyond standard engine OBD2:
- Full system scan for supported ECUs
- ABS, SRS airbag, transmission and powertrain checks when available
- Deeper diagnostic trouble code context
- One-tap AI-ready diagnostic prompt with vehicle data and fault code details

Live data and test tools
Build a real-time dashboard for the values you care about during a road test, repair check or used car inspection. OBD2UDS also includes acceleration testing, battery voltage and cranking drop checks, fuel and energy monitoring, cabin noise monitoring and annual inspection pre-check tools.

Useful for
- Check engine light diagnosis
- Used car inspection before buying
- Emissions readiness and smog check preparation
- DIY maintenance and repair
- Live data logging during road tests
- Quick mobile diagnostics in the workshop

OBD2UDS works with common ELM327 Bluetooth OBD2 adapters. Available functions depend on your vehicle, adapter quality, protocol support and selected ECU module. Use a reliable adapter and keep the ignition on while scanning.

Download OBD2UDS for practical OBD2 diagnostics, live data monitoring and advanced UDS scanning on Android.

What’s new

Improved multilingual localization and fixed known bugs.