My 2004 Volvo S60 (70,000 miles) has had intermittent electrical issues its entire life. I've taken it to one Volvo dealer who reset the codes and did a software update, and another dealer who did a full diagnostic and recommended replacing the DIM (drivers information module) for about $1800. I did not have confidence in his diagnosis and declined.
The error codes are below. I don't see why replacing the DIM would fix all error codes. Maybe doing software updates of all systems could do something for me. If you need me to post the car's symptoms and error messages, I can do that, but I'd rather find an underlying cause of the problems than replace one system after the other only to find that the problem persists.
The error codes were:
AUM-E003 Configuration fault, Faulty configuration
BCM-0100 Communication between control units, Communicational problems with ECM
BCM-E003 Configuration fault, Faulty configuration
CEM-1A62 Communication with ECM control module, Signal missing
CEM-1D08 Control module, Internal fault
DDM-0025 Mirror motor, Signal missing
DIM-E003 Configuration fault, Faulty Configuration
PSM-E003 Configuration fault, Faulty configuration
SRS-00D5 SRS lam, Configuration fault
UEM-0080 Rain sensor, Signal missing