I’m lost
 

I have a 2009 a4 Quattro my alternator default comes on with battery not being charged I have replaced alternator with factory alternator 5 times all keep reading 11.2 volts checked all grounds fuse boxes put new mopar battery in also changed battery current sensor changed tension pulley and belt went through all wires and battery still will not charge I’m stunned does the alternator need to be reset on computer or maybe battery reset also