Peugeot Repair Questions? Ask a Mechanic for Answers ASAP
if the oil leak has only started after the the turbo change, then I'd say to check that the oil drain hose from the turbo is secured to the sump properly
and to get a pollution fault light then I'd suggest the next step is to plug in a scan tool and pull off the fault code
as this will point to the fault
it may be worth removing the inlet hose after the turbo to check for any signs of oil?
as this will test if the replacement turbo isn't faulty