S60 T5 L5-2.3L Turbo VIN 53 B5234T3 (2002)
Blow through center hole with compressed air.
Air should emerge from outer hole (2).
If plunger is sticking or solenoid fails to operate electrically, the direction of flow will be unchanged from step 1.
VVT solenoid, cleaning
Remove solenoid from aluminum housing.