I couldn't get the truck into the brake maintenance mode using the button method so I tried Forscan and it worked. Now I can't get it out using either of them. Forscan got stuck at 12% the first time before being "interrupted", then 9% the second time.

The truck has been in the low battery setting. I've also had a low DEF warning on the dash to which I need to hit "ok" (cause it does have low DEF).

What should I do? Idle to get the battery up a bit and try again?

 

Battery charger?

 

Yes, I could probably find one. If that's the problem, of course.