Scania fault code 4228

Code 4228 is used by 3 different Scania systems. Choose the control unit shown in your diagnostic tool:

EMU Heater H40, internal fault The heater is reporting that the secondary transistor current is above 500 mA, while the PWM signal to both heater elements is low. Read explanation → BMU Battery Management Unit Cell monitoring circuit board, interruption The control system is unable to find all cell monitoring circuit boards. Read explanation → DDU Guide microphone, break in circuit Information is missing, update is in progress. Read explanation →