I recently bought a 07 XC90 with 146k. Everything handled nicely until a snow storm hit and noticed AWD isn't working. I checked with a ViDA DiCE and it said (DEM-P188914 Oil pressure pump performance. General electrical fault. Short circuit to ground or open circuit) code. I took it back to the dealer and they installed a new pump and added new fluid. The error code went away and the same day a new code appeared. This time it's saying (DEM-P188974 Oil Pressure Pump Performance. Mechanical Failures. Actuator slipping).

I'm lost at this point

Attached diagnostic reports

 

Back to the dealer.