ELM327 OBD2 V2.1 Bluetooth Interface Auto Car Diagnostic Scanner

ELM327 OBD2 V2.1 Bluetooth Interface Auto Car Diagnostic Scanner an on-Board Diagnostics, or OBD, in an automotive context, is a generic term referring to a vehicles self-diagnostic and reporting capability. OBD systems give the vehicle owner or a repair technician access to the state of health information for various vehicle sub-systems.
The amount of diagnostic information available via OBD has varied widely since the introduction in the early 1980s of on-board vehicle computers, which made OBD possible. Early instances of OBD would simply illuminate a malfunction indicator light, or MIL, if a problem was detected but would not provide any information as to the nature of the problem.