Citroen Ds4 Crossfire

[IANB]

My lad has one of these on a 66 plate.
The adblue light came on and he filled it up. Engine management light also came on code reading nox sensor. The adblue warning will not clear stating shut down in 650 miles. Any French motor techies on here have any suggestions.

TIA

 

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Adblue pump failure. - Citroen DS4 Forums

may help to look at this forum mate

 

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Safety Recall on my DS4 Crossback - Citroen DS4 Forums

there may be a recall on there systems from reading this post