CEM-IA64 Communication with AOC control module

[NgunnawalJack]

Got my '03 XC70 back from 90,000km service last night.

My mechanic found a CEM-IA64 Communication with AOC control module fault code he couldn't clear. He was unable to explain the cause.:mad: Car road tested ok

Any ideas?

Thanks

[FirstVolvo]

This is a signal missing code from the differential electronic module and since it was just serviced it is likely the wiring/connector to the DEM was disconnected or broken, I would check there first.

CEM-1A64 Communication with the differential electronic module (DEM). Signal missing
http://www.ppc-diagnostic.com/codes/eCEM/c1A64/

DEM description and location
http://www.sae.org/automag/techbriefs/02-2002/page4.htm