Mack Truck Fault Codes & Problems

DEF System Fault Mack Commercial Truck A Mack DEF system fault means the SCR system has detected low fluid, … DPF Regen Required Mack Commercial Truck A Mack regen required indicator means the DPF is loaded with soot. Drive at … MP Engine Fault Mack Commercial Truck A Mack amber engine warning means the ECM has stored a fault on the MP-7 or MP-8 …