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An OBD 4 Pin Diagnostic Cable is a cable used to connect a vehicle’s onboard diagnostic (OBD) system to a diagnostic tool, such as a scan tool or code reader. OBD systems are used to monitor the performance and emissions of a vehicle’s engine and other systems, and provide real-time data on various parameters such as engine RPM, coolant temperature, and fuel economy.
The 4-pin connector is used for cars with OBD1 and this type of diagnostic cable is used to read diagnostic trouble codes, clear codes, and read live data from the vehicle’s computer. This type of cable is also used for reprogramming the engine control module (ECM) or other electronic control modules (ECUs) on a vehicle.
