Hello I have a 2008 sterling with a mercedees engine. I have 2 codes
1. doser fuel line pressure failed self test spn 4077 fmi 135
2. Dpf zone 2 condition spn3719 fmi135
My assumption is a problem with the doser fuel supply has caused incomplete regens and is plugging the dpf.
How do I check or diagnose the doser fuel line for issues? Is this a common problem on mercedees engines? I only have a prolink ultra which is very limited as to how much I can do. Any info as to how to diagnose and repair this issue is appreciated.
Sterling with mercedees 2 emission codes
Discussion in 'Freightliner Forum' started by bowtieboy77, Nov 23, 2019.