Propeller Shop 2002 VOLVO C70 Oil Light Is On, Good Oil Pressure ,bad Turbo?

2002 VOLVO C70 Oil light is on, good oil pressure ,bad turbo? - propeller shop

I need high technology in this I have to help a Volvo C70 Turbo 2002, purchased with a bad turbo, broke the leakage of oil released by the propeller. I had a shop change the turbo, the oil light was the car for the race and clear oil from the turbo back exhaust bolt sheared off. It checks the oil pressure and said it was good that they changed the optical unit of transmission, but oil is still to come. I had the turbo oil line in the event of disability change. That sounds like an oil pump, thereby distinguishing the turbo on the bad? Or a clogged filter? The motor does not seem to fight and makes no noise, oil pan has not been removed. Ideas? O TSB. Or SSM?