White stuff in engine bay

[Ttr]

Hi does anyone know what this is? 

It's the 2.00 litre diesel

[varooom]

AdBlue?

 

 

Edited 21 December, 2022 by varooom
Additional Information

[Danoid]

I didn’t know this was a thing but hopefully it’s just a hose or o ring.

 

Might be worth getting rid of all of it so it looks new, go for a drive or just let it idle and see if you can see the source before it builds up like that

[Ttr]

Thanks for the info. Very helpful. 

[ApertureS]

Adblue injector or hose cracked - personally I’d replace both as they are fairly common.

 

remember the system should be purged once replaced else you may get a nox efficiency code appear after a few 100 miles 

[muddyboots]

I've just found the exact same buildup in ours (MY2016 TDI 150).

 

Had a couple of "Reductant pressure too low" errors recently, popped my head under the bonnet and immediately saw a huge clump of white crystals.

I guess when it stops raining I'll clear it all off and see if I can spot where it's leaking.

 

Anyone know how DIY-able replacing either the injector or hose would be ?