Hey guys I'm really stumped, brand new truck and has check engine light on for a couple of codes - SPN- 3216- aftertreamtment intake NOx Recieved network data in error, 3226 - aftertreamtment outlet NOx Recieved network data in error, SPN 4340 Diesel exhaust fluid line heater 1 state- current below normal or open circuit and SPN 5743- SCR temp sensor module Recieved network data in error, i was thinking maybe it's a wiring harness that's smushed and getting bad connection or maybe even the computer but I don't know where to go from here to be honest. ANY IDEAS?????
You are right, it is wiring harness problem. The engine has to have those online or it freaks out and derates you. Check the fuses in the little fuse box at the firewall near the air cleaner. When they all go out like that, it is either no power, no communication or a bad module that is shorting everything else connected.
