Mine has factory fitted O2 sensors, it also has one of those weird, if I recall correctly 3 holes, sockets. You can read the ABS faults, and the alarm system. but still not the ECU. All of the sensor inputs are voltages, so can be read with a DVM. The after market "ECU Mate" will show all the inputs as the algorithm just converts them to a graphical display. Maybe some of the others will also do that also, I do not know.The reader is far more useful when o2 sensors are fitted
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