AR 1.9 JTDM power lose, error code P0045
I own AR 159 1.9JTDM 2005 production year, 290k km(about 180k miles) on the clock for about few months and dint have any problems. But few days ago, about 1-2 times in a day i got instant power loss, turbo gauge needle did not move at all(no boost), car wont go above 2100rpm. But no warning messages displayed on dashboard. After engine restart it drives normally like nothing happened. Today i hooked up diagnostic when that power lose occurred again and i got P0045 error code (Turbo actuator command/ Turbo/Super Charger Boost Control Solenoid Circuit/Open). After an engine restart, error code disappears. What cause that strange behavior, is it that vacuum solenoid, or something else?
Maybe somebody experienced such problem? I should mention car is remapped, DPF and RGR are removed.
(Sorry for my english, its not my native language)