Which OBD-II codes can the Connection Key identify?

Pretty much all of them! The Connection Key will be able to identify issues, symptoms, severity and solutions for nearly all Powertrain, Chassis, Body and Network codes. Some codes are specially written by the manufacturer of the vehicle, which are also picked up by the Connection Key.

With the Powertrain codes (which will be the majority of all OBD-II codes shown), youmay even receive make-specific, or model specific descriptions for your vehicle as alluded to above. For all Chassis, Body and Network codes, the synopsis will be general, but will still give an accurate description of what the issue is.