What is this code?

HI,
I am looking to get a used 2011 volvo, vmnl, I shift. It looks all nice ad good but as soon as I turned it on,it has a check engine light and this code: SA0 SPN 639 FMI2. Anyone knows what this code is? I don't want them to just cancel it and turn out to be something serious. Please help.

 

j1939 error . one of installed modules has communication error.

 

Thank you.

 

I have same issue same code SPN 639 FMI 2 my question is, what ended up being the issue?

 

Hii i m having same issue please tell me what you had tovfix it and how much it cost you thanks

 

Hii i m having same issue please tell me what you had tovfix it and how much it cost you thanks

 

Same here what did you do to fix it?

 

Pls what you did I have same issue

 

I just bought an ECU because of this code. $1200 new, $1800 before core exchange.

God, I pray it fixes it. Will not know until Monday.