Scania fault code 4179

Code 4179 is used by 3 different Scania systems. Choose the control unit shown in your diagnostic tool:

EMS Engine Management System Insufficient heating of the DPF Diesel Particulate Filter, hydrocarbon desorption timeout The level of hydrocarbons in the particulate filter is high and the engine operation has not caused high enough temperatures to remove the hydrocarbons. Read explanation → EMU Heater H39, communication error One or more CAN messages are missing. Read explanation → DDU Loudspeaker in right-hand door, short circuit to voltage supply The DDU control unit interprets a short circuit to voltage supply for the loudspeaker in the right-hand door. Read explanation →