At times and very frequently truck is losing power to accelerate, very slow to accelerate, will not go over 50mph. this happens everywhere doesn't matter the speed or location. when this happens the turbo psi reads 0, and you can't hear the turbo. a warning will come up that says the exhaust needs to self clean and drive to clean. sometimes it will have thick smoke come out the exhaust that stinks. sometimes the truck will shake violently when trying to accelerate or brake. very dangerous when driving on the highway and the truck will not accelerate so that i can merge without being rear-ended. sometimes it will loose all power so i have to let up on the gas and try again softly and it will slowly accelerate this has also happened at a traffic light that turned green for me, as i was entering the intersection i lost all power and was almost rear-ended. the first happened when i was trying to get into the right slow lane on the highway from being pulled over on the shoulder and as i stepped on the gas and the truck did not accelerate at normal speeds and i was unable to accelerate to speed in order enter traffic in time to not get rear-ended by the car coming up in the lane i was trying to enter thankfully the other driver switched out of that lane.