Scania fault code 4165
Code 4165 is used by 3 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
SCR system compressed air supply
The SCR system compressed air supply is not sufficient to allow the SCR system to start.
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EMU
Refrigerant compressor E158, high temperature
The refrigerant compressor reports too high a temperature.
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DDU
Tweeter on left-hand A-pillar panel, short circuit to voltage supply
The DDU control unit interprets a short circuit to voltage supply for the tweeter on the left-hand A-pillar panel.
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