AI OBD2 scanner

Read your OBD2 code. Find out what to check next.

Already have a code like P0420? Enter it with your vehicle details to see what it means and which checks can help narrow down the cause. To read codes directly from your car, use a compatible adapter with the iPhone or Android app.

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Quick Help requires an account and includes a daily AI Mechanic chat allowance — no card required.

Check adapter compatibility

Check your adapter before you connect

Check the connection type in your adapter’s manual. “Bluetooth” alone does not tell you whether it uses Bluetooth LE or Bluetooth Classic.

Connection options for compatible ELM327 adapters in the MECH AI mobile app
Connection	iPhone	Android
Bluetooth LE (BLE)	Yes	Yes
Bluetooth Classic (SPP)	No	Yes
Wi-Fi	Yes	Yes
USB	No	No

These are connection options, not a guarantee for every adapter or vehicle. A reader made only for its manufacturer’s app may not work with MECH AI. Available codes and readings depend on the vehicle and adapter.

Choose the matching connection

Bluetooth LE: choose BLE in the app and allow the Bluetooth permissions it requests.
Bluetooth Classic: on Android, pair the adapter in the phone’s Bluetooth settings first, then choose Classic in MECH AI. Classic-only adapters do not connect through the iPhone app.
Wi-Fi: join the adapter’s Wi-Fi network first. Then use the address and port from its instructions in MECH AI.

Using a web browser? You can enter a code from another reader in Quick Help. Connecting directly to an adapter requires the iPhone or Android app.

What is an AI OBD2 scanner?

A scanner reads the codes stored by your car. An AI assistant can help you interpret them alongside the symptoms. For example, the P0420 guide explains the catalyst efficiency warning and the checks that help narrow down its cause. Quick Help lets you ask follow-up questions about your own vehicle.

OBD2 code reader app

Read codes on iPhone or Android. Diagnose them in the same app.

Pair a compatible Bluetooth LE or WiFi ELM327 adapter to read stored, pending, and permanent trouble codes. MECH AI then adds the part most code-reader apps leave out: a diagnosis scoped to your year, make, model, and symptoms, with likely causes ranked before you buy parts.

✓ Free code scanning
✓ Plain-English code explanations
✓ Emissions readiness and live data
✓ Read-only—no ECU flashing

No adapter yet?

You can still type any code from a parts-store scan, another reader, or a repair estimate. Hardware is optional for AI diagnosis.

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Scanner data + AI reasoning

The code is the easy part. The diagnosis is the point.

Code explanations for your vehicle

Add the year, make, model and engine to your code. Describe when the warning appeared so Quick Help can suggest checks that fit your vehicle.

Codes from another reader

Type the full code from your scan report, including its first letter. Share any other codes that appeared alongside it.

Questions for a repair estimate

If your quote lists a replacement part, ask which test linked that part to the code. Bring the code and the test result when you discuss the estimate.

Live sensor data over Bluetooth

Pair a Bluetooth (BLE) ELM327 adapter in the iOS or Android app and read codes free — plus 11 live readings, emissions readiness, and plain-English health warnings with the Plus plan. Read-only.

Read-only, no risky flashing

The scanner reads codes and sensor data. It does not flash the ECU. You can share the readings with the technician who inspects the car.

Use a code from your existing reader

Have a scan report from another tool? Type the code into Quick Help with your vehicle details. Direct connection to MECH AI depends on the adapter and phone; check the compatibility guide above.

Start with a specific code: the OBD2 code library, the car diagnostic app, or honest comparisons — vs OBD AI, vs FIXD.

FAQ

AI OBD2 scanner questions.

What is an AI OBD2 scanner?

It combines a scan tool with guidance on what the readings mean. With a compatible ELM327 adapter, the MECH AI mobile app can read codes from your car. If you already have a scan report, type the code into Quick Help on the web or in the app.

Do I need to buy a scanner to use it?

No. MECH AI works from your words or a code you already have — describe the symptom or type in the DTC. If you own an ELM327 reader or scan tool, it interprets what that found. Free to start with a daily AI Mechanic chat allowance — no card required.

What should I include when I enter a code?

Include the full code, year, make, model and engine, plus the symptoms you noticed. If your reader shows whether the code is stored or pending, include that detail too.

Does it work with ELM327 / generic OBD2 adapters?

Compatible ELM327 adapters can connect over Bluetooth LE or Wi-Fi on iPhone and Android. Bluetooth Classic is Android-only; USB is not supported. Check the adapter’s manual and the connection options in the app. Reading trouble codes is free. Live sensor readings and emissions readiness are available from Plus.

How is it different from FIXD or OBD AI?

With MECH AI you can enter a code you already have, or use a compatible adapter to scan with the mobile app. See the linked app comparisons for differences in hardware, features and pricing.

Read the code. Then actually understand it.

Enter a code from your scanner and describe what your car is doing. Quick Help can suggest what to check first.

Ask about my code

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