Scania fault code 4400
Code 4400 is used by 4 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
Coolant temperature
The signal from the coolant temperature sensor has been implausible compared with the signal expected during current operational conditions. The value is lower than expected.
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DDU
SSC_AndroidAutoCertificate_Error
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AMS
Missing CAN information from EMS
Signals affecting emissions legislation are missing from the EMS.
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GSC
Gas leakage in the low pressure section
The fuel pressure has dropped too much in a short period of time.
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