J1939 SPN 3350 — Body/Chassis parameter

What it means

Aftertreatment 1 Selective Catalytic Reduction (SCR) Dosing Unit Temperature. Note: In specific heavy-duty contexts (like PACCAR or Freightliner), SPN 3350 is often associated with the Body Controller or SCR system temperature sensor. In general J1939, it refers to the SCR Doser temperature.