2000 S70 glt se, twice in the last two weeks while apply the brake hard I got a check engine light and P442 code came up and said evap emission control(small vac leak) or something like that, anyway where should I start looking for a leak?

 

I recently put a radiator in my V70, and afterwards got the same code. I had removed some stuff to do the job, and the problem turned out to be two things....the clamp on the hose that goes from the airbox to the turbo, an a small vacuum hose (white plastic) that attaches just next to that clamp.

I had forgotten to tighten the clamp, and the small vacuum hose had also slipped off. I'd start with all the hoses that attach around the inlet area of the turbo.

 

Silicone vacuum lines are cheap enough and the job is easy enough, I'd say just replace them all and be done with it. But I was having the same code in my 2000 GLT SE and the vacuum line that exits the intake manifold and goes to a T fitting was completely collapsed and I also had significant increase in brake pressure after replacing that line.