[Madmax43]

I had a '99 plate V70XC in black. Similar issues as yours. Terrible MPG (c.24mpg) and sluggish off the mark. Except I had no VIDA DTC's. The car was immaculate and served us for 7 years but I got tired of the poor economy.
I got rid of it in favour of a '54 XC90. More MPG from the XC!
Not much of a solution I am afraid.