Scania fault code 4123
Code 4123 is used by 3 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
Voltage supply for components in the SCR system
The voltage in the reductant doser voltage supply circuit has been too low.
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DDU
Supplementary voltage supply for camera 1, break in circuit
Information is missing, update is in progress.
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LAS Locking and Alarm System
Remote control 8
The control unit detects that the remote control is transmitting a continuous signal.
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