Update, finished charging the batteries and reconnected all cables. Auto Start/Stop still disabled. I did check the battery voltages when car was off as well as when starting. Main and Aux battery were at 12.8, main dipped to 11.05 when cranking, Aux battery dipped to 11.8 when cranking. Do you think these voltages are causing the auto start/stop to disable? Once the car was started, both levels were at 14.4 volts, so the alternator is working and should be charging the batteries. I'm just very confused why the light came on while I was already 6 hours into my trip on the highway doing 75mph when the in car voltmeter said the batteries were at 14.0-14.4 volts?