I don't have a ScanGauge (have looked at them though...) - but do have a code reader... The OBD 2 connector is standard on all passenger cars since the late 90's... So one code reader reads all the engine fault codes. (not the ABS or other systems - they haven't standardized that...)
Some auto parts stores will also read the code for free.
All the readers I have seen allow you to reset as well. (Of course if the fault still exists it will come back on shortly...)
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