Scania fault code 4403
Code 4403 is used by 7 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
Coolant temperature
The engine coolant temperature exceeds the maximum value.
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BMU Battery Management Unit
Battery module 3, flexible printed circuit board, small internal failure
Internal fault in flexible printed circuit board.
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EMD
Coolant temperature
The engine coolant temperature exceeds the maximum value.
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EME
Coolant temperature
The engine coolant temperature exceeds the maximum value.
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EMO
Coolant temperature
The engine coolant temperature exceeds the maximum value.
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DDU
Internal amplifier – Speaker L1 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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