2004 LB7 runs rough lots of codes

Jonathanlbradford

New member
Nov 3, 2025
1
0
1
Arkansas
I have a 2004 LB7 that had a failed injector. Flooding the oil until it stopped getting enough pressure to start. No codes. I installed new injectors and started it up to find the following codes and it runs like crap: P0201 P0204 P0206 B2102 P0721 C0600 P0085 U0802 P00EC. Any guidance or help finding the problem would be greatly appreciated. I have checked for continuity and resistance at all injector harnesses and am confident the injectors are all good. They are 30 overs from Lincoln Diesel. I do find I am receiving voltage to Pins 3 and 118 on the FICM connectors as well. What should my next steps be and could it be the FICM?


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2004LB7

Super Moderator
Staff member
Dec 15, 2010
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Norcal
P2102 and P0085 don't show up on my list of DTCs. Are you sure these are correct?