Update
Changed the MAF sensor and with about 15 minutes the error can back, so has predicated its not the MAF.
managed to see it happen this whist screen recording (attached picture)
I can see the EGR sticking, then releasing and the sticking again. So now convinced its EGR valve.
I will have to contact Volvo and see what they say. I am hoping they do the same goodwill gesture due to it having Volvo full service history. Was thinking of taking out a warranty however I not many cover the EGR
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