DEF reservoir got low and light came on indicating about 300 miles until truck goes into limp mode 5 MPH. Added 1 gallon of DEF and the guage showed to be in the safe zone. The computer system never registered that fluid was added and truck went into limp mode on the way home. When in limp mode you are unable to move vehicle off the roadway in a safe manner or even drive on any roadway without major risk of getting hit. Truck has to be towed to a dealership to have the computer reset. EXTREMELY DANGEROUS. Ironic that first responder and government vehicles with this same engine ect are omitted from the limp mode function due to safety concerns but not the general public.

- Jacksonville, TX, USA

At 28,000 miles my vehicle in the middle of the Highway going up a hill stall and suddenly lose boost or was inoperable to safety get out of the road. i was able to do a unsafe maneuvering to get out of the way with the momentum of speed that i have at the moment When this happened a message on my screen said power boost service require, contact your dealer. Later and after the poor customer service in moreno valley ca. And yuma az my local dealer provide., i found out that my fuel pump(cp4) went down, completely destroyed on the inside sending metal particles trough the entire fuel system. 93,000 and again my vehicle went out of service exactly for the same reason(cp4) And now at 135,000 miles my vehicle is down again the reason is idle pulley broke and my serpentine belt got damage at the same time serpentine belt damage my crank sensor and i found out today that is on back order until the 3th week of november I have all documents in order to support the complaints im here to submit today

- Yuma, AZ, USA