Scania fault code 4104

EMS Engine Management System Communication between the NOx sensor downstream of the catalytic converter and the SCR control unit. From the sensor diagnostics Read explanation → EMU Temperature sensor T251, power electronics before the radiator, short circuit to earth The control unit gives an implausibly low voltage, which indicates a short circuit to earth. Read explanation → DDU External Side detection warning sound, short circuit to voltage supply Information is missing, update is in progress. Read explanation → PCS The value of basic low idle speed from EMS is higher than the PCS low idle setting Unexpected low idle speed from EMS. Read explanation →