It acts as a bridge between your computer/mobile and the car. The adapter is attached to a car's OBD2 port. For the communication, a small OBD adapter is needed in addition. OBD diagnostic software communicates with the car and reads the diagnostic information from the car.
The OBD2 system offers valuable information, including diagnostic trouble codes, when troubleshooting problems. OBD-II systems provide access to the health information of a vehicle and access to numerous parameters and sensors from the Engine Control Unit (ECU).
On-Board Diagnostics, or OBD, is a computer-based system built into modern passenger cars that monitors emission related controls and performance of the engine, and detects malfunctions.
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