🚨 Fault Code 3255: What You Need to Know https://shorturl.at/l645t Your truck’s DPF outlet temperature sensor just sent you a warning, fault code 3255 (SPN 3246 FMI 0 or 16). If left unchecked, this could mean major aftertreatment system damage. Here’s what’s happening: DPF outlet temp exceeded safe limits Regens halted, torque reduced to prevent overheating In severe cases, engine shutdown may be triggered How to Fix It - Key cycle – turn off the engine, wait 1 min, restart - Let the engine id