My neighbour owned a 2016 Citroen diesel van which needed repairing about a year ago as the adblue tank and the adblue injector needed replacing.
Not a cheap repair.
She traded it in for a 2018 Peugot diesel van and there is now an adblue fault showing.
She gets the fault diagnosed on Friday.
Whilst it may be coincidence, I decided to do some research.
This led me to look at adblue systems in general, and to my surprise, I discovered that adblue has a freezing point of -11c.
Perhaps there is a clue there.
I understand that adblue may called other things elsewhere.
Adblue
Re: Adblue
Horsepicices I believe.