Check eng light

[Waterloo]

You have to put DEF in the truck correct? Or has it been deleted? The DEF is fed through the SCR system, there is a filter under there somewhere near the DEF tank, that needs to be serviced now and then, I would think at least once or twice a year. If not serviced strange codes pop up and can lead to further SCR system damage if I recall correctly. I have an older truck, no SCR system, just going by what I have read here and heard at Mr Hagg's shop and Rawze's house.

If you have a delete, I am assuming you do not, and are getting this SCR code, I would say you have other, possibly more serious issues going on, and need to have the programming inspected.

I wish I could be of more help, hopefully one of the guys with SCR experience will chime in.