Medium and Heavy Trucks
Have Truck Repair Questions? Ask an Expert
good afternoon my name is ***** ***** I will assist
year, make, model, engine of the truck???
how are you??
ok. let me get the info for you from the freightliner web site
ok, it indicates an open in one of the heater circuits for the def heater.
it is common for the wires to break either at the def pump or at the 1 box where the lines attach to the metering block
look at all the connectors and behind each connector. you may have to peel back the insulation to find it. the wire usually breaks and the circuits open. check that
I attached the description to this post
483.3 SPN 4358/FMI 5 - EPA10
Diesel Exhaust Fluid Metering Unit Doser Heater Circuit Failed Open