Scania fault code 4640
Code 4640 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 built up the current in the unit injector solenoid valve too quickly.
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EEC Exhaust Emission Control
Fuel injection for exhaust gas aftertreatment
Fault in air control valve to fuel injection nozzle.
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