Mack Pl64T M778 7855 spn fault code name is Engine Fueling Not Desired Reason.
If you don't take the time to look into Mack Pl64T M778 7855 spn fault when it arises, it can add up quickly.
One small issue like Mack Pl64T M778 7855 can cause a larger component to become damaged without taking the
time to investigate. If you suspect your truck is suffering from one of these issues, look into replacing those
small components to save money down the road.
Note: The name and description of Mack Pl64T M778 7855 code represents text descriptions for faults supported by another coding system and does not necessarily comply with SAE J1939. For a specific engine manufacturer's explanation for codes, please consult the engine's technical manual. See also other spn codes.