Pablo, I could use your help

Sbaumann14, not sure if your still on here but need some help with some codes, i've googled them with no results, driving me crazy! Mid 136 sid 251 fmi 3, break ecu, light control module. Been having problems with batterys buldging and leaking, called volvo they said it could run on just 2 batterys thats what we did for a week, bought 2 new ones today and the codes started. Have a vn670 2007...and i'm a girl and not the driver so bare with me if i dont even sound like i know what i'm asking...lol would appreciate anyones help at this point, thank you in advance!