If you checked all the connections on the top of the CEM and found no water ingress, then I would suspect you have damp/water in the DEM.
The DTC ABS-0094 coms with ECU is the same I saw when my DEM failed on my XC70.
Eventually it will fail altogether , volvodiagnostic.com can repair the DEM or provide rebuilt replacements, that's were I got mine from.
A failed DEM will cause a lots of other DTCs like you are seeing.
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