I have a 05 xc 90 2.5t with valve train knocking. on 2005 Volvo XC90

Noticed valve train knocking at low rpm. It does not make the knocking sound until after engine is warm. There is no power loss and engine performs well through the rpm range. OBD scan code at auto parts store says p0027 Intake control valve solenoid circuit bank 1. Any help with this would be appreciated.

Asked by for the 2005 Volvo XC90