CodeGuru - OBD2 Car Scanner

Check engine light on? Plug in an ELM327 adapter and find out what your car is actually saying — in under a minute, in your own language.

CodeGuru turns your phone into a full OBD2 car scanner. Read and clear fault codes, watch live sensor data, and scan every control module in the vehicle — not just the engine.

🔧 READ & CLEAR FAULT CODES

• Read engine fault codes (DTCs) and clear them with one tap

• Turn off the check engine light once the repair is done

• Over 18,000 code definitions built in — 9,400 generic and 9,300 manufacturer-specific

• Every code explained in plain words, not workshop jargon

• Tells a live fault apart from a pending one and from old history, so you are not chasing a problem the car fixed months ago

🚨 FULL SYSTEM SCAN — not just the engine

Most free apps read the engine and stop there. CodeGuru asks every module your car has:

• ABS / brakes

• Airbag / SRS

• Gearbox / transmission

• Power steering, body control, immobiliser and more

• Clear one module on its own, without touching the rest

📊 LIVE DATA & GAUGES

• Real-time dashboard with gauges you choose, drag and arrange

• Every OBD2 sensor your car supports, on one searchable screen

• Live graphs over 30 seconds, 1 minute or 2 minutes

• RPM, speed, coolant temperature, intake air, engine load, throttle, MAF air flow, fuel level, timing advance, battery voltage and many more

🩺 HEALTH & REPORTS

• Health score with a plain-language summary of what was found

• Freeze frame — the exact sensor values at the moment the fault was stored

• Mode 06 on-board monitor test results

• Emission readiness check before an inspection

• Share a diagnostic report straight from your phone

🚗 TRIPS & PERFORMANCE

• Trip log with distance, time, fuel use and how gently it was driven

• Optional GPS route for each drive

• 0–100 km/h, quarter mile (402 m) and 100–0 braking tests

• Garage for several vehicles, with VIN

🌍 SPEAKS YOUR LANGUAGE

English, Hindi, Hinglish, Spanish, French, Portuguese, German, Arabic, Turkish and Russian. Faults can be read aloud if you would rather listen than read.

🔌 WORKS WITH YOUR ADAPTER

Bluetooth Classic, Bluetooth Low Energy (BLE), WiFi and USB OTG — any ELM327-compatible OBD2 adapter.

🚘 WORKS WITH YOUR CAR

Any vehicle built to the OBD-II / EOBD standard: petrol from 2001 and diesel from 2004 in Europe, and most cars built after 1996 in the US.

📵 WORKS OFFLINE

The trouble-code database lives on your phone. No account, no sign-up, and no internet needed to diagnose a car at the roadside.

👑 PREMIUM

• No ads anywhere in the app

• Every live sensor, not just the ten basics

• Full system scan of every module

Monthly subscription through Google Play, renews automatically, cancel any time in Google Play → Subscriptions.

⚠️ YOU NEED AN ADAPTER

An ELM327 OBD2 adapter is sold separately. It plugs into the OBD port under the dashboard. What the app can show depends on what your vehicle's ECU reports — no app can show data a car does not provide.

Do not use the app while driving. A fault code is not a diagnosis, and clearing codes erases the module's stored memory and resets the emission readiness monitors.