ChatOBD2 | AI for ELM327

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About this app

ChatOBD2 | AI for ELM327
ELM327 Car Scanner with Expert-AI: fault codes, live data, OEM Car Scanner

ChatOBD2 turns your phone into a Car Scanner and OBD-II diagnostic assistant for ELM327-compatible adapters. It connects over BLE, classic Bluetooth and Wi-Fi, including common generic units and widely used firmware revisions such as v1.5, v2.1 and v2.2. There is no adapter brand lock, and ChatOBD2 does not sell adapters.

On supported vehicles, OEM Car Diagnostic menus for brand ECUs (faults, clearing, live data and identity) are available alongside standard OBD-II (SAE J1979).

Connectivity and vehicle
- ELM327-compatible adapter over BLE, classic Bluetooth or Wi-Fi
- Common firmware classes including v1.5, v2.1 and v2.2, with no brand lock
- Connection status and reconnection handling
- VIN reading and vehicle identification, including VIN photo scan
- Manual make, model and year selection if VIN is unavailable
- Vehicle session history with chats and logs by VIN
- Brand and OEM ECU menus on supported cars

Faults and diagnostics
- Fault code (DTC) reading: confirmed, pending and permanent
- Fault code clearing (Mode 04), only with your confirmation
- Code title and detailed description from a multilingual catalog
- Probable causes, symptoms and inspection tips
- Freeze frame data
- Readiness and I/M monitor summary
- Mode 06, battery and ECU information on supported vehicles
- Battery and cranking test
- OEM multi scan across supported modules in one run
- Information on chronic and known issues
- Summaries in work-order and verification format

Parts and repair
- Relevant parts based on the faults found
- Repair guide with step-by-step instructions
- Brand-specific repair guidance on supported vehicles
- Fault details and report in HTML
- Parts list report

Live data and driving
- Live PID dashboard: RPM, speed, temperature, trim, load and more
- MAF test with speed-density estimate and measured-value comparison
- PID selection, interval, graph and gauge views
- Live recording (CSV) and annotation
- Freeze frame to live data trend comparison
- 0-100 km/h acceleration test
- Road-dyno style power estimation
- Measurement reports

Reports, storage and settings
- Open, share and print HTML reports
- History of vehicle chats and test logs
- Storage management
- Multi-language, theme and font size options
- Account and purchase management

Who is this for?
- Drivers using ELM327-compatible adapters, including common generic units
- Workshops, mechanics and enthusiasts
- Anyone who wants fault codes, OEM menus on supported cars, reports and AI-assisted guidance

Important legal note
ChatOBD2 does not sell, rent or license manufacturer dealer diagnostic suites. It is an independent OBD-II assistant with brand and OEM ECU paths where the in-app catalog supports them. Brand names belong to their respective owners. The AI assistant and repair tips are guidance only; the final decision rests with you or your mechanic. Safe driving and legal use are your responsibility.

Adapter: ELM327-compatible (BLE, Bluetooth, Wi-Fi), common firmware including v1.5, v2.1 and v2.2 class units.
Site: https://www.chatobd2.com/
ELM327: https://www.chatobd2.com/elm327/
Support: https://www.chatobd2.com/contact.html

What’s new

7 days of FREE use with no payment required