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i got this bmw x5 that only cranks for a second then stops .i checked the prurple wire at alternator and checked wave form and its good it charges fine check the wire from alternator reg purple to batterie sense and its good.i get code 2dbe.im also getting too much voltage to my crank sensor the yellow and white coming from pin 27 from dme is getting 11.75 v.any help would be great