2013 Fusion SE 2.0L Code P0234 Overboost condition.
The solution for my vehicle was a wastegate solenoid assembly (CJ5Z-9K378-B) which includes replacement hoses and the clamps.
NOTE DO NOT BUY just the Solenoid Ford part (CJ5Z-9K378-A) which is $20 cheaper. While they look almost exactly the same, the electric connector is different and it will not fit. How do I know this? I am insanely cheap. This time my frugal nature cost me an additional trip to the parts store for an exchange.
Learn from my error. You're welcome!
45 min hour install. 20 of that was just finding the location of the part as I did not have a manual.
Let the car cool completely.
Ramp or jack the vehicle.
Remove the debris shield.
From underneath the vehicle look for the part on the back of the engine, passenger side, near the turbocharger.
Remove the electrical connector, three hoses/clamps.
The part is mounted on a small bracket with a detent to keep it in place. Wiggle it back and forth to get it off the bracket.
Reverse the process to install the replacement.
I have seen people quote $300 for diag and installation of this part. This was not at all a difficult job at all. Good place to start.