That code is air leaking out. If you're sure the n75 and ALL vacuum lines are good, you may have a boost leak somewhere. Some possibilities are the rubber intake piping and couplers.
Other possibilities are a bad wastegate or bad turbo. Apply air pressure to the wastegate and it should move the wastegate arm. It should also hold the pressure.
It could also be fuel related - bad fuel filter, clogged fuel filter, clogged fuel lines or fuel pick up at the fuel tank, bad injection pump. However, fix the error code first.
Other possibilities are a bad wastegate or bad turbo. Apply air pressure to the wastegate and it should move the wastegate arm. It should also hold the pressure.
It could also be fuel related - bad fuel filter, clogged fuel filter, clogged fuel lines or fuel pick up at the fuel tank, bad injection pump. However, fix the error code first.