Yesterday i was getting on the ramp on the highway, i hit the gas hard and the car jerked and lost power.(didnt cut off). There was the whistleing of the turbo in the air. I checked under the hood and the Throttle body pipe that connects to the couplet had came of. I just tightned it back and now the car idles ruff between 900-1100 rpms. When i drive and let off the gas the rpms drop back to 1000rpms sometimes. The code came of as p1238. How do you know if its just hoses are bad or the TCV? Or should i just replace all of it?

2001 v70 t5