code 3582 spn 4364

[JimT]

Not sure exactly what you truck's exhaust setup is like, but many of the systems on these 2250's had a problem with the outlet NOx sensor and excessive road spray causing faults. There is an update for a water "shield", (4907978) Aftertreatment Outlet NOx Sensor Bolt-In Water Shield

All in all, it seems those outlet NOx sensors don't have a very long useful life and often fail by giving valid but incorrect readings (like 0). That reading is very important in how the engine runs and the aftertreatment system operates. Outside of soot collection and regeneration in the DPF, keeping the NOx output within certain levels is the entire job of the EGR and SCR systems. The last one on my truck didn't even last 2 years before it started giving erroneous readings.