OBD is short for OnBoard Diagnostics. The system has been utilized in the average vehicle for decades. The first iteration (OBD1) was replaced in the early 1990s, which is why OBD-II tools are much more common.
OBD-II
By 1996, every vehicle manufactured officially adopted the newer OnBoard Diagnostic system. OBD-II is a massive improvement over its predecessor, offering much more accurate information. As these systems improved diagnostic capabilities, their codes became more complex. So today, that's why there is such a wide variety of diagnostic machines.
PLUG-IN
The most common type of OBD-II device is a scanner that plugs into your vehicle and displays information on a built-in screen. These range from low price options, which can show any Check Engine code, to the premium price range, which have the ability to show a much larger variety of codes.
WIRELESS
Wireless OBD-II scanners—also referred to as Bluetooth or WiFi scanners in their descriptions—are small health diagnosis devices that stay plugged into the OBD port and send diagnostic information to your phone or computer.
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