About OBD Fusion (Car Diagnostics)
OBD Fusion is an app that allows you to read OBD2 vehicle data directly from your Android phone or tablet. You can clear your check engine light, read diagnostic trouble codes, estimate fuel economy and much more! OBD...
OBD Fusion is an app that allows you to read OBD2 vehicle data directly from your Android phone or tablet. You can clear your check engine light, read diagnostic trouble codes, estimate fuel economy and much more! OBD Fusion has a ton of features that are used by professional car mechanics, do-it-yourselfers, and users who want to monitor car data during day to day driving. Some of the features include customizable dashboards, real-time graphing of vehicle sensors, emission readiness status, data logging and exporting, oxygen sensor tests, Boost readout, and a full diagnostic report.
Is your check engine light on? Do you want to monitor fuel economy and usage in your vehicle? Do you want cool looking gauges on your Android phone or tablet? If so, then OBD Fusion is the app for you!
OBD Fusion is a vehicle diagnostics tool that connects to OBD-II and EOBD vehicles. Not sure if your vehicle is OBD-2, EOBD or JOBD compliant? See this page for more information: https://www.obdsoftware.net/support/knowledge-base/how-do-i-know-whether-my-vehicle-is-obd-ii-compliant/. OBD Fusion works with some JOBD compliant vehicles and in some cases requires modifications to the connection settings in the app. Please contact us for more information.
You must have a compatible scan tool to use this software. For recommended scan tools, see our website https://www.obdsoftware.net/software/obdfusion. Please note that cheap ELM clone adapters can be unreliable. OBD Fusion can connect to any ELM 327 compatible adapter, but the cheap clone adapters tend to have slow refresh rates and might disconnect randomly.
OBD Fusion for Android is brought to you by OCTech, LLC, the developers of TouchScan and OBDwiz for Windows and OBDLink for Android. Now you can get the same great features for your phone or tablet.
OBD Fusion has the following features:
• Android Auto support. Note that Android Auto does not support dashboard gauges.
• Read and clear diagnostic trouble codes and your Check Engine Light (MIL/CEL)
• Real-time dashboard display
• Real-time graphing
• Fuel economy MPG, MPG (UK), l/100km or km/l calculation
• Create custom enhanced PIDs
• Includes some built-in enhanced PIDs for GM vehicles including engine misfires, transmission temp, and oil temp.
• Multiple trip meters for tracking fuel economy, fuel usage, EV energy economy, and distance
• Customizable dashboards with fast dashboard switching
• Log data to CSV format and export for viewing in any spreadsheet application
• Display battery voltage
• Display Engine Torque, Engine Power, Turbo Boost pressure, and air-to-fuel (A/F) ratio (vehicle must support the required PIDs)
• Read freeze frame data
• English, Imperial, and Metric units that are fully customizable
• Over 250 supported PIDs
• Displays vehicle information including VIN number and calibration ID
• Emissions readiness for each US state
• Oxygen Sensor Results (Mode $05)
• On-board Monitoring Tests (Mode $06)
• In-performance Tracking Counters (Mode $09)
• Full diagnostic report that can be stored and emailed
• Option to select the connected ECU
• Built-in database of fault code definitions
• Bluetooth, Bluetooth LE*, USB**, and Wi-Fi*** scan tool support
• Available in English, Spanish, French, Italian, German, Czech, Greek, Chinese, and Portuguese
* Your Android device must have Bluetooth LE support.
** You must have a tablet with USB host support to connect using a USB device. Only FTDI USB devices are supported.
*** Your Android device must support ad-hoc Wi-Fi connections to use a Wi-Fi adapter.
OBD Fusion is a trademark of OCTech, LLC registered in the U.S.
Previous Versions
Here you can find the changelog of OBD Fusion (Car Diagnostics) since it was posted on our website on 2013-08-23 11:57:07.
The latest version is 7.4.0 and it was updated on 2026-10-12 16:54:45. See below the changes in each version.
OBD Fusion (Car Diagnostics) version 7.4.0
Updated At: 2026-07-20
Changes: - Added enhanced diagnostics for 2026 Ford vehicles. Use the vehicle editor to check support for your vehicle.
- Added some additional Manufacturer PIDs for GM vehicles.
- Made improvements to the Trip Statistics page.
- Multiple bug fixes and improvements.
OBD Fusion (Car Diagnostics) version 7.3.0
Updated At: 2026-07-20
Changes: - Added support for displaying Info Types on gauges, graphs, etc.
- Added manufacturer PIDs for transmission temperature for some Subaru vehicles.
- Multiple bug fixes and improvements.
OBD Fusion (Car Diagnostics) version 7.2.0
Updated At: 2026-05-28
Changes: - Added enhanced diagnostics for 2025 and 2026 Mazda vehicles.
- Added support for state displays to user-defined PIDs. A state display is a textual value that's mapped to a numeric value (e.g. 0 = "Off", 1 = "On").
- Added support for state displays to digital gauges.
- Digital gauges can now be rectangular and are no longer restricted to being square.
- Made improvements to distance calculations and added a distance calculation method preference.
- Multiple bug fixes and improvements.
OBD Fusion (Car Diagnostics) version 7.1.1
Updated At: 2026-04-15
Changes: - Added a new Manufacturer PID type that includes some enhanced PID definitions for GM vehicles.
- Added the ability to export/import individual dashboards.
- Added the ability to reference enhanced PIDs in user PID equations. An enhanced add-on is required to read an enhanced PID.
- Added support for exporting user PID definitions.
- New user PID equations must now use a decimal point for decimals, even when the current culture uses a decimal comma.
- Graphing now supports cursors.
OBD Fusion (Car Diagnostics) version 6.14.0
Updated At: 2026-03-11
Changes: - Added support for devices that use 16 KB page sizes.
- Minor bug fixes and improvements.
OBD Fusion (Car Diagnostics) version 6.12.0
Updated At: 2025-07-29
Changes: - Added Simplified Chinese and Portuguese language support.
- Added Ford 2025 enhanced diagnostics.
- Added enhanced diagnostics for a few 2024 Ford vehicles that were previously missing.
- Added an option to prompt to enable Bluetooth when the app starts.
- Fixed a bug that prevented the units from being written to CSV files in some cases.
- Fixed a bug that caused the vehicle speed multiplier to be applied twice in some cases.
- Multiple bug fixes and improvements.
OBD Fusion (Car Diagnostics) version 6.11.0
Updated At: 2025-06-23
Changes: - Added support for real-time data logging and playback.
- Added German language support.
- Updated the Spanish, French, Italian, Greek, and Czech translations.
- Added the ability to select the app language.
- Added a trip cost PID.
- Added calculations for energy cost for EVs and plug-in hybrid vehicles. You must set the electric energy cost in the vehicle editor.
- Added a new push button gauge actions for data logging and capturing a diagnostic report.
- Multiple bug fixes and improvements.
OBD Fusion (Car Diagnostics) version 6.10.0
Updated At: 2025-05-13
Changes: - Improved the FCA enhanced add-on to detect additional PIDs on some vehicles. A PID rescan is required to get access to the additional PIDs.
- Added the ability to manually configure the y-axis min and max values for each PID being graphed.
- Added a button to easily insert an existing PID into a user-defined PID equation.
- Added support for the CAR2LS Bluetooth LE adapter.
- Increased the range of values that can be entered for Volumetric Efficiency.
- Various bug fixes and improvements.
OBD Fusion (Car Diagnostics) version 6.9.0
Updated At: 2025-02-17
Changes: - Added enhanced diagnostics for 2023 and 2024 Mitsubishi vehicles.
- Made improvements to Mazda enhanced diagnostics. On some vehicles, you might be prompted to perform a network scan the next time you connect due to the addition of modules.
- Fixed a bug that could cause the Network Scan prompt to be displayed every time you connect to a Ford vehicle, even after successfully completing the scan.
- Various bug fixes and improvements
OBD Fusion (Car Diagnostics) version 6.8.0
Updated At: 2025-01-14
Changes: - Made significant improvements to the time it takes to load FCA enhanced diagnostics and connect to enhanced networks. You will notice the improvement the second time you connect to an FCA enhanced network.
- Updated the trouble code definition database
- Various bug fixes and improvements
