Help! The following error codes have come up on my 2001 Volvo S80 T6: P1175 and P1185, which means "System too rich", Inake Blocked, EVAP Canister Purge Valve, Fuel Pressure High, EGR System, Injectors...

I just had the following replaced:

Engine Torque Mount
Control Arms
Ball Joint
Timing Belt Kit
Mass Air Flow Sensor
Water Pump
Idler Pulley
O2 Sensor

Any ideas on what could be the issue? I just put a boatload of money into this car and am hoping that I don't have to put a lot more.

Thanks!