Online guide

What is an OBD-II connector and does my car have one?

Note: OBD-II scanner is NOT required for the mLog.

On-board diagnostics (OBD) is an automotive term referring to a vehicle’s self-diagnostic and reporting capability. OBD systems give a vehicle’s owner or a repair technician access to the status of that vehicle’s various subsystems. An example of a subsystem is the check engine light notification.

Chart of OBD-II compliant vehicles:

Country Where You Live Fully Supported Years Incompletely Supported Years
United States (gas) 1996 and newer 1994 and 1995
United States (diesel) 2004 and newer 1996 to 2003
United States (Heavy-Duty vehicles with GVRW exceeding 14000 pounds)   1996 and newer
Canada (gas) 1998 and newer 1996 and 1997
Europe and UK (gas/petrol) 2000/01 and newer 1996 to 1999
Europe and UK (diesel) 2003/04 and newer 1996-2002
All other countries   1996 and newer

Please note that mLog requires your vehicle to support a very specific code: OBD PID 31 - “Distance traveled since codes cleared.” Vehicles that are OBD-II compliant may or may not support this code and it is hard to predict which vehicles will support this code simply based on their makes and models. Please consult your vehicle’s owner’s manual and other information available online to see if your vehicle supports this code.

Find out where the OBD-II connector is located in your vehicle

*The vehicle names may differ from the actual vehicle but should serve as a reference for a successful pairing.

What is a Bluetooth OBD-II scanner and where can I buy one?

Bluetooth OBD-II scanners are small devices that plug into a vehicle’s OBD connector and transfers data via Bluetooth. OBD-II scanners work with iPhones, iPads, and iPods. Note: Unfortunately, we do not support OBD-II devices from CellAssist.

Here are two OBD scan tools that work with mLog:


LELink OBD-II     Veepeak OBD-II

Why do other cheaper WiFi OBD-II scan tools not work?

WiFi OBD-II scan tools have one big caveat. Since they serve as WiFi hotspots/routers but do not actually connect to the internet, you cannot use maps, navigation, email and other apps that require Wifi while you are driving.

We strongly recommend Bluetooth OBD-II scan tools for this reason. LELink Bluetooth Low Energy OBD-II is one of the best products on the market.  It’s been tested and it works flawlessly with TripLog.

Many mLog users have been satisfied with the Veepeak OBDCheck BLE OBD-II Scanner as well.

How does mLog for iOS Auto Start a trip and get your vehicle’s odometer reading from the OBD-II scan tool?

  1. Plug the OBD-II scan tool into the OBD connector and then start the engine.

  2. Open the mLog iOS app and go to Menu ( ≡ ) >  Auto Start Settings > Auto Start On > OBD-II scan tool (LELink/Veepeak).

  3. On the same settings page select Calibrate OBD-II device. The app will read your vehicle’s VIN and odometer reading and then show the vehicle list. Select the right vehicle > OK.

  4. Uncheck Enable Auto Start and then check it back on. This will reset the Auto Start process.

  5. The next time that you start the engine, the OBD-II scan tool will be automatically connected. After you drive over a specified speed threshold, a new trip will automatically start.

  6. When you arrive at your destination, park and turn off the engine. After a few seconds, the OBD-II scan tool will be automatically disconnected and the trip will be automatically stopped. Due to how the OBD Standard was created, OBD devices only give distance in kilometers. If you use miles, there might be some loss of precision and readings may be up to 1 mile off.