Check engine light

Deleted as I didn't read post w comprehension.

 

SPN 102 is for the boost sensor. FMI 18 means that boost pressure is too low. Do you have any leaks in the CAC or CAC hoses? You can check the plugs at the boost and barometric pressure sensors, but I doubt you find corrosion on a new truck. You may get lucky and find one that wasn't seated good. After that is laptop diagnosing with DDDL.

On a 2015, you still have warranty, so I would bring it to a dealer if you don't find something obvious.

 

Did you find the problem

 

I have a 2016 FL Cascadia DD15 with a FL Warrty and that code ENG2 SPN 102 FMI 18 is constantly popping up even after the dealership says it’s fixed. It is always when I leave and around 100 miles into my trip the same code pops up. I’ve had the DOC cleaned which is what they said was wrong at one dealership, I had the turbo checked and they said they did work on it and it was fixed, then I took it to another one and they fixed what was the CAC had two major leaks at the clamps and boost hoses
Correction:
Engine / Air Intake / Induction / Replace boost hoses and clamps
0411 BLUE SILICONE HOSE CLAMP CAC HOSE 0425 FREIGHTLINER
and after I left and 93 miles driving bobtail the same code popped up yet again!!!
Same code pops up but no one seems to be able to fix it and instead fixes other things and clears the code. This is the only issue I have with the truck...two years and several stops at different FL dealerships and still nothing but wastes time and staying at home making mo money.

 

What ended up happening?
I have the exact problem.

 

Did you find out the problem ? Dealing with the same issue