Scania fault code 4404
Code 4404 is used by 4 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
Coolant temperature sensor T33 or the temperature sensor in the electric motor of variable geometry turbocharger M30
The coolant temperature sensor has detected that the coolant temperature is too high for OBD to run.
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BMU Battery Management Unit
Battery module 4, flexible printed circuit board, small internal failure
Internal fault in flexible printed circuit board.
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DDU
Internal amplifier – Speaker L2 Overcurrent
Fault detected by internal amplifier diagnostic
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AMS
EEC, Control unit for exhaust gas aftertreatment, communication fault
The EEC control unit has lost contact with the EMS engine control unit.
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