Volvo All Engines (2010 Emissions) Fault Code: SPN 641 FMI 4 PID: SID 27 Engine Variable Geometry Turbocharger (VGT) Actuator 1
The (VGT) Variable Geometry Turbocharger Actuator is a self-contained component with motors, sensors and a control unit.
The (VGT) Variable Geometry Turbocharger uses a movable nozzle to adjust the intake manifold pressure for various operating conditions. Nozzle movement is controlled by an actuator mounted on the tubocharger. When the Engine Control Module (ECM) Relay is energized, a fuse supplies battery voltage to the (VGT) Variable Geometry Turbocharger and the unit is grounded by means of the engine block.
Conditions for diagnostic trouble code (DTC):
1) Actuator voltage is less than 10 volts for 10 continuous seconds
Observable symptoms
1) Low Power
2) Regeneration not possible
Probable cause
1) Software
2) Voltage supply interrupted
3) Poor ground connection
4) Actuator
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