There are a range of OBD2 scan tools and how they connect and display data. The most common types of connections are:
- Bluetooth – This uses bluetooth to connect to your device which will most commonly be a phone or a tablet. You will find that these mainly work on Android devices as iOS does not allow third party apps to access the bluetooth like this. The befits of bluetooth is that it means you will still have internet so when you pull up an engine error code the App you are using will provide and link to the internet that will provide you with more information.
- Wifi – This provides a wifi hotspot that you can connect your phone or tablet to. These devices will work on both Android and iOS devices. The problem with WiFi can sometimes be that you have to disconnect to to access the internet to look things up etc. Or with some apps they may need to update when they are connected so you have to disconnect and connect again.
- Handheld Cable – These are all in one units that have a cable and a screen. All you have to do is plug them in and away you go. These are the most reliable and simple to use units.
- Cable – Most commonly used for connecting a computer to the OBD2 port. These are used a lot at the more commercial level and on older systems were people have not updated there system they use to access the cars OBD in some time.