2005 V70 2.5T P0027 P0039 code fix?

[ataylor]

I keep getting P0027 and P0039 codes popping up on my 2005 V70 2.5T. Driveability is suffering. All will be good and power feels correct then it will act "starved" of fuel for a second or two. Then it will be good for a while..... ultimately it'll happen again unpredictably.

I've look up the codes and now I just need to know what ave to go to get them fixed.
P0039 is (Turbocharger / Supercharger Bypass Valve Control Circuit Range / Performance)
P0027 is (Exhaust Valve Control Solenoid Circuit Range / Performance (Bank 1)

any ideas are welcome.
thanks
AT

[draser]

For p0027 check vvt solenoid on top of engine, under plastic cover next to timing belt area. Unplug and inspect conn condition, and ohm meter solenoid on low ohm scale. If all checks out you may have to remove valve and clean.