Exhaust system bypassed

This is what the technician told me today when they had a look at one of my trucks.

It is a 2010 Intl prostar bought in a dealership owned by Daimler.

It had a 60 day warranty for whatever goes wrong with the truck and that classic NTP warranty after that

In those 60 days it stopped once and it was taken to a Freightliner dealership (that's what was the term of that warranty because Daimler owns Freightliner i think)

Bunch of things were changed. DPF, turbo, EGR, DOC as well I think and I never saw the truck since

Now 3 lights are on and these people think it was bypassed.

Is this even possible? That somebody (dealership owned by Daimler or the biggest Freightliner in CT) actually did this?

As far as I understand it is illegal.

Any info or any similar experiences would be helpful

Thank you!

 

Heavyhauler, the reason why I have only 3 posts is because I dispatch and run a company of 10 trucks (teams) almost by myself.
Really no time for me to hang around here. Why I'm I even posting here? Because in the past I found some posts from this forum more than helpful.
I am not asking who does it and how is it done. I am directly pointing at the people who sold me the truck or the dealership who made major repairs on it.

I managed to dig up a receipt for the repairs and will try to hide my companies name and the dealership too so I can post it here. Basically it is showing that the whole system is changed. EGR, DPF,DOC,turbo
So if the dealersip changed everything how in the world they couldn't see the whole system was bypased?
Now I come to a conclusion they did that and that brings a question that I asked at first: how could somebody reputable do something like this?
I only payed like a grand out of my pocket and everything went on warranty, but still,

 

Thank you! The second one seems very interesting, I'll have to take some time to read it carefully

So what happens now if we get pulled over and have a GOOD level 1 inspection?

Does a annual dot inspection cover inspection of this system? Because it was done in the dealership...

Can anybody be legally responsible for this?

At this point, what is my best solution for this problem?