mid 125 not responding

how did u see the code? any other numbers behind it? have tired turning the ignition off for 5 minutes to try and let it reset itself?

 

here is some engine code infor but 125 is not on there. I think the 125 is a general code for the engine most likely electrical/sensor. keep that link for info?

http://www.diesel-service-parts.com/celect-plus-codes.html

 

truck and engine type would be helpful.

 

may be MID 128 - EECU?????
MID 125 is not used

 

Volvo with ISX put ECM fuse in battary box hidden in small fuse box. it goes bad when batteries blow some acid in summer with corrosion. On some FH cabovers this fuse is hidden with rear battery. Just change it and keep running