Just took a call from the dealers. They advise the new issue is unrelated to the previous issue.
Apparently the V70 is very sensitive to engine oil level - the optimal level being about two-thirds full on the dip-stick, according to the dealers.
On my car the oil level was below the maximum level, but high enough to worry the car mangement system. So they have removed some enginge oil.
The interesting thing here is that the car was last serviced about April/May last year and hasn't been topped up since.
Apparently the oil level can also affect the DPF / particulate filter regeneration process although I'm not sure what connection there would be between oil level and the PDF.
Hopefully this will cure it now!
Tom
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