#obd-ll

OBD-II is a computer-based system that is designed to reduce emissions by monitoring the performance of major engine components. So when vehicle exhaust higher level of air pollution contents, OBD-II will generate Diagnostic Trouble Code (DTC) message and check engine light will display. OBD system monitors different parameters of vehicle and store information in memory but does not have any interface for users. Whenever a fault arises in the vehicle, the system senses that fault and notifies it to the user using a Malfunction Indicator Light (MIL). This is not an effective way of warning indication because the user cannot tell which part has the fault, what the fault is and when it occurs.