Volvo All Engines (2017 Emissions) Fault Code: P004598 PID: EMS Turbocharger/Supercharger Boost Control “A” Circuit / Open

Volvo All Engines (2017 Emissions) Fault Code: P004598 PID: EMS Turbocharger/Supercharger Boost Control “A” Circuit / Open

Circuit description
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)
High actuator temperature

Observable symptoms
None

Probable cause
1) Variable Geometry Turbo temperature too high
2) Variable Geometry Turbo