LambdaOBD - OBD2 Car Scanner

Check engine light on? Turn your Bluetooth ELM327 adapter into a powerful OBD2 scanner and car diagnostic tool.

LambdaOBD helps you read engine fault codes, understand check engine warnings, monitor live engine data and check your vehicle's health. No technical expertise needed. Just connect your OBD2 adapter and get clear explanations of what your car is reporting.

**OBD2 SCANNER & FAULT CODE READER**

Everything you need to understand your car's engine diagnostics:

• Read and clear OBD2 fault codes (DTCs), including stored, pending and permanent codes.
• View freeze frame data and OBD2 readiness monitors.
• Understand fault codes through descriptions, symptoms and likely causes.
• Access information for 850+ common fault codes and titles for 9,000+ generic codes, powered by the open OBDex database.
• See what clearing diagnostic trouble codes resets before confirming.

**CAR HEALTH CHECK & USED CAR INSPECTION**

Get a quick overview of your vehicle's electronic health in approximately 30 seconds.

• Check engine fault codes and readiness monitors.
• See how recently diagnostic codes were cleared.
• Monitor engine behavior at idle.
• Get a clear health verdict based on the available diagnostic data.

A useful OBD2 check when buying or selling a used car. Know what the engine computer reports before making a decision.

**LIVE OBD2 DATA & ENGINE MONITORING**

Turn your phone into a real-time vehicle monitoring dashboard.

• Monitor engine RPM, coolant temperature and vehicle sensors.
• Track short-term and long-term fuel trims.
• View oxygen sensor readings and other live engine parameters.
• Choose the data you want to monitor and visualize multiple values on a live chart.
• Use a dedicated Driving View with a large speedometer and essential vehicle information.

Keep an eye on engine temperature, battery voltage and other important readings while driving.

**GARAGE & VEHICLE MANAGEMENT**

Keep your connected vehicles organized in one place.

• Automatically save every connected vehicle.
• Access previous diagnostic scans and recorded drives.
• Identify compatible vehicles through VIN decoding.
• For North American vehicles, retrieve make, model, year, engine and additional vehicle details using the U.S. NHTSA database.

**LAMBDAOBD PRO – ONE-TIME PURCHASE**

Unlock additional diagnostic and monitoring tools with a single payment. No monthly or yearly subscriptions.

• PDF Health Reports – Generate a complete vehicle health report to share with a buyer, seller or mechanic.
• Guided Diagnosis – Get step-by-step suggestions on what to check next based on stored fault codes or reported symptoms.
• Drive Recording – Record vehicle data, replay your drives and export recordings as CSV files.
• All future Pro features included.

**PRIVATE BY DESIGN**

Your car data belongs to you.

• No account or registration.
• No advertisements.
• No tracking.
• No internet permission.
• Your vehicle information, diagnostic scans and driving data stay on your device.

No cloud accounts. No unnecessary data collection. Just offline OBD2 diagnostics.

**COMPATIBLE OBD2 ADAPTERS & REQUIREMENTS**

To use LambdaOBD, you need:

• An Android phone running Android 7.0 or newer.
• A vehicle equipped with OBD2 / OBD-II.
• A Bluetooth Classic ELM327-compatible OBD2 adapter.

Vehicle compatibility:
• USA: Most cars manufactured from 1996 onward.
• European Union: Petrol cars from 2001 and diesel cars from 2004 onward.

Bluetooth Low Energy (BLE) and Wi-Fi OBD2 adapters are not currently supported.

**IMPORTANT INFORMATION**

Available diagnostic parameters depend on your vehicle's ECU and supported OBD2 protocols. LambdaOBD displays the data your vehicle provides.

The health check evaluates available engine diagnostic information. It is not a mechanical inspection, and diagnostic results do not replace professional vehicle inspection or a qualified mechanic.

Download LambdaOBD and turn your ELM327 adapter into a smarter OBD2 diagnostic tool.

Recent changes:
First release of LambdaOBD.
• Read and clear fault codes, with likely causes in plain words
• Health check: battery, cooling and fuel trims
• Live sensors and gauges, with a calm Drive view for the road
• Record a drive and export it as CSV
• A garage for your cars
Works offline, no account, collects no data. Needs a Bluetooth ELM327 OBD-II adapter.
Optional Pro: one purchase, no subscription.