Will your OBD2 adapter work with Honest Mechanic?

Adapters tested by Honest Mechanic

These models have been tested with HM on iOS and Android.

If your adapter is not listed, that does not mean it is incompatible. This list records the models we have tested; other ELM327-compatible BLE adapters may also work.

• OBDLink CX
• Veepeak BLE
• Carista OBD / Code Reader (COBD-BT25)
• Vgate iCar Pro BLE 4.0 · View on Amazon

The BLE guidance above does not extend to Wi-Fi adapters or models that require a proprietary app.

Already have an OBD2 adapter? Try it first

If your adapter uses BLE and is ELM327-compatible, connect it through HM and try a scan following the app's instructions. It does not have to appear in the tested list for you to try it.

Check the exact model and connection type on the adapter, its packaging or the manufacturer's documentation. If you need help connecting, contact support@honestmechanic.ai with the model name and what the app shows.

Vehicle requirements

• The vehicle must have a working OBD-II port and support the information requested by the selected check.
• Most vehicles sold in the United States since 1996 have an OBD-II port, but the data available varies by make, model, year, module, and operating condition.
• The adapter must be plugged in and the vehicle must be on or in ignition-on mode as instructed in the app.

What generic OBD-II may not see

Generic OBD-II is mainly focused on powertrain and emissions information. It may not expose ABS, airbag/SRS, TPMS, body, comfort, infotainment, or other manufacturer-specific modules. It also cannot inspect tires, brakes, suspension, steering, body damage, rust, leaks, noises, or physical wear.

Phone permissions

• Bluetooth or nearby-device access is needed to discover and connect to an adapter.
• Some Android devices may require location permission for nearby Bluetooth discovery. Honest Mechanic does not use that permission for GPS tracking.
• Microphone access is only needed when you choose a voice feature.

Before relying on a result

A successful connection does not mean every vehicle system was checked. A result describes only the information available in that session. Honest Mechanic does not replace a professional inspection or hands-on diagnosis.

Questions about an adapter or vehicle? Contact support@honestmechanic.ai.

Ready to understand what your car reports?

With a compatible adapter, use Honest Mechanic to review the available scan results and ask questions about them.

Download Honest Mechanic for iPhone or Android

See an example: what P0172 and P0175 reported in a documented Mercedes case.