Scania fault code 4401
Code 4401 is used by 4 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
Coolant temperature sensor T33
The coolant temperature shown is higher than expected or the temperature in the variable geometry turbocharger is lower than expected.
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BMU Battery Management Unit
Battery module 1, flexible printed circuit board, small internal failure
Internal fault in flexible printed circuit board.
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DDU
SSC_AndroidAutoCertificate_Expired
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GSC
Gas leakage in the low pressure section
The fuel pressure has varied to an implausible extent.
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