Set Condition:
WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The PCM detects that the NOx Absorber Catalyst (NAC)-(DJ/D2) inlet or the Diesel Oxidation Catalyst (DOC)-(DC/DM) inlet temperature sensor reading is not increasing with engine operating temperature after engine startup.