Seems the software update may have caused an issue probably needs to go to a reputable dealer to look into the software issues, what engine and spec is the xc60 reduced performance could be. One of many things but dpf springs to mind do you do lots of short trips? Was the car low mileage when you bought it ?
There were egr issues on some models there was a recall get VIN checked hat the EGR cooler recall has been done...
New manifold seems an odd replacement ???
Last edited by HDAV; Jun 6th, 2019 at 22:56.
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