Scania fault code 4646
Code 4646 is used by 2 different Scania systems. Choose the control unit shown in your diagnostic tool:
EMS Engine Management System
Unit injector for cylinder 2
The control unit has detected that the solenoid valve in the unit injector has closed too late. Start of injection timing is later than expected.
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EEC Exhaust Emission Control
Fuel injection for exhaust gas aftertreatment
The fuel pressure in the valve block for exhaust gas aftertreatment is too high when the fuel valve for the fuel injection nozzle is open.
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