Scania fault code 4409
Code 4409 is used by 3 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
The oil pressure is below the set limit value
The oil pressure is below the requested limit value. The oil pump cannot increase the oil pressure to the calibrated value.
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BMU Battery Management Unit
Battery module 9, flexible printed circuit board, small internal failure
Internal fault in flexible printed circuit board.
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DDU
Internal amplifier -- Power Vdd supply voltage above Over-voltage threshold
Fault detected by internal amplifier diagnostic
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