AUDI: SOME VEHICLES ENGINE WARNING LIGHT SPORADICALLY ILLUMINATES, WOULD HAVE REDUCED PERFORMANCE WITHOUT LOSS OF POWER/STALLING OR NOISE COMING FROM ENGINE COMPARTMENT DUE TO LOW SYSTEM VOLTAGE, AND NOT ENOUGH ON/OFF RATIO TO KEEP FUEL METERING VALVE CONSTANT IN ALL AREAS, THE ENGINE CONTROL MODULE SOFTWARE NEED TO BE UPDATED. MODEL 2013-2014 S6, S7, A8, S8. *PE
