Medium and Heavy Trucks
Have Truck Repair Questions? Ask an Expert
Hello there! I am a qualified Heavy Equipment Technician here at Just Answer, I will help you diagnose and repair the problem you are having with your 2014 Kenworth.I have worked on many DEF emissions systems, mostly on freight liner equipment. If Kenworth uses the same type of system as Freightliner, there should be both a DEF quantity pump, as well as an air pressure valve from your air tank to pressurize the DEF. Check your system to see if there is air pressure being applied to the system. If there is, check to be sure it is receiving the correct pressure (usually around 30-50psi).Let me know your findings and we can go from there!Derek
Have you run a stationary regen since you replace the parts you mentioned? On some emissions systems a burn must be completed before the codes are cleared the the control module.
Using your ESN, i will look up more information regarding the dosing valve and the electrical schematic. I will keep you updated.
In order to find the information, I will need the VIN number of the truck, the model of the truck, and the make model of the engine. Please supply these when you have a moment.Thanks