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That code is for the Turbo actuator self test. The PCM is reporting the actuator position does not match up the position commanded. Sounds like the sensor or actuator are bad, loss of power would indicate to me the actuator is not moving the guide vanes.
I have never tried to change the actuator, so I can't help you there.
You can visually check the actuator by looking at the "dog-bone" on the top of the turbos. 1. make sure its still connected, 2. when the ignition key is turned to "run" (not start), the actuator cycles (if working correctly you should see it move forward, then backward), you'll likely want someone to assist as you can't see it from the drivers seat with the hood open.