Obd Mary is an EOBD / OBD-2 car diagnostic scanner, gauge dashboard, and trip computer with a range of useful features. The app works with OBD2 Car Scanner OBD Mary to read and clear OBD-2 Trouble Codes and to diagnose various vehicle ECUs such as ABS, SRS, Airbag, HVAC, and more. It supports a broad list of brands, including Acura, Alfa Romeo, Audi, BMW, Ford, Honda, Toyota, Mercedes-Benz, Volvo, and many others, making it a versatile choice for both casual drivers and car enthusiasts.

To connect, you’ll need an ELM327 Bluetooth or Wi‑Fi adapter. The app can scan for and pair with the adapter, and once connected, you can start diagnostics, monitor live data, and customize your experience. A quick-start guide helps you get up and running in minutes, with steps from plugging in the adapter to initiating a connection in the app. The app uses a foreground service to maintain a steady link with the ELM adapter, even when the device screen is off, ensuring you have continuous access to critical vehicle data.

1. Download the Obd Mary app.
2. Plug the ELM327 adapter into the 16-pin diagnostic connector in your vehicle.
3. Turn on the ignition.
4. Discover your Bluetooth ELM adapter in your Android device settings.
5. Select the discovered ELM327 adapter in the app settings.
6. Try to connect and start diagnosing.

You can read and reset trouble codes from OBD2-compliant control units. The app provides fault code descriptions and allows you to search for solutions online with a single tap. Freeze-frame data can be read when a DTC is active, and you can monitor live parameters such as speed, RPM, MAF, and coolant temperature to understand how the engine behaves in real time.

Use Obd Mary as a customizable gauge dashboard. Create your own set of gauges and tailor nearly every parameter—sizes, colors, stroke positions, arrows, texts, labels, and backgrounds. Gauges can be resized and moved in edit mode to place them exactly where you want on the screen, giving you a personalized, at-a-glance view of the most important data.

Keep the adapter connected and let the app log your trips. The trip data includes trip time, fuel consumption, fuel cost, average speed, max speed, and more, helping you analyze driving habits, fuel efficiency, and overall vehicle performance on the road.

Upgrade to the full version to enjoy complete functionality without ads. Purchasing the full version supports ongoing development and future enhancements, ensuring you get the most out of your OBD2 scanning experience.

The application uses a foreground service to maintain a constant connection with the Wi‑Fi or Bluetooth ELM adapter for communication with modern vehicles, whether the app is in the foreground or running in the background. It stores data locally to provide information about average fuel rate, average speed, mileage, trip time, and other statistics, even when the app is not actively in use.

Have you ever wondered what’s happening under the hood of your car? Obd Mary – Car Scanner for ELM makes it feel like you’ve got a personal mechanic in your pocket. Built to work with ELM327 OBD2 adapters, this app delivers real-time diagnostics right to your smartphone, so you can monitor your vehicle’s health on the go. Getting started is a breeze: connect the ELM327 adapter to your car’s OBD2 port, launch the app, and it instantly begins communicating with your vehicle. The interface is clean and intuitive, with a dashboard that highlights essential metrics like engine RPM, speed, and fuel consumption, while offering a scalable, user-friendly experience across a wide range of car models.

One standout feature is the ability to read and clear Diagnostic Trouble Codes (DTCs). If the check engine light pops on, Obd Mary explains the fault and, after repair, lets you clear the codes directly from the app—no need for a trip to the shop. Real-time data streaming is another big draw, showing live values such as coolant temperature and MAF, which is especially satisfying for tech enthusiasts who love watching graphs and metrics update in real time.

The app doubles as a versatile dashboard. You can customize a gauge cluster that suits your preferences, rearranging and resizing gauges, choosing colors, and tweaking backgrounds to create a personalized driving companion. For those who are serious about driving efficiency, the trip computer tracks trip time, fuel usage, and even fuel cost, offering insights into how to optimize routes and habits for better mileage. The app’s broad compatibility means many makes—from mainstream sedans to performance models—are supported, making it a practical tool for a wide audience.

Despite its depth, Obd Mary remains approachable and multilingual, ensuring accessibility for a global community of drivers and hobbyists. The availability of a full version without ads makes long-term usage even more appealing, while the foreground service keeps a reliable connection to the ELM adapter so you don’t miss critical data on the road. If you’re curious about your car’s performance or simply want a more informed ownership experience, Obd Mary offers a balanced blend of essential OBD2 diagnostics, real-time data, and clear visualizations that help you understand what your vehicle is telling you. It’s a practical, capable tool for anyone who loves staying on top of their car’s health and performance.