2016 Legacy Limited Battery drain

[pastorjeff]

My 2016 Legacy has a battery drain it seems when left sitting for a month or so without running, especially in the cold weather. Any thoughts?

 

[Duboisly]

Same issue. 2 dead batteries so far. A couple of issues. The charging system is controlled by the computer. The computer does not always charge the car. They have a program update to have the computer charge the battery more often. There is a tech bulletin for this. 2nd item is the DCM is always trying to connect to the satellites. Now that there is no more 3g the DCM doesn't go into sleep mode. There is a extended warranty notice for this. Good luck.