Mk6 golf 1.6tdi underboosting

[XbrokenVWdailyX]

So ive got a 2011 mk6 golf with the 1.6tdi, it doesnt boost as “hard” as it used to and feels sluggish pulling away.

I drove a couple other vehicles with the same engine and my golf just feels slow compared to them.

Im going for mapping in a week but want to get the most power i can out of her and i dont want to have issues if something is wrong.

Any ideas what is the issue?

[Jon44w]

Get it scanned for fault codes

[Crasher]

Don't go too far with the mapping, it causes the DPF to clog faster than normal and remember the CAYC is not a strong engine nor is the clutch.