What is code u3fff dodge 2500 diesel?

The U3FFF code on a Dodge 2500 diesel typically refers to an issue related to the exhaust gas recirculation (EGR) system or the diesel particulate filter (DPF). This code may indicate that the vehicle's computer has detected a fault in the emissions control system, which can affect engine performance and emissions compliance. It's advisable to use a diagnostic scanner to confirm the exact issue and consult a mechanic for proper diagnosis and repair.