2012 XC90 - long list of error codes - related?

[drjarmin]

The car symptoms are AWD not coming on, AC fan blower not working, ABS warning light on. Cleared the system and ran VIDA and was presented with a long list of nearly 30 error codes. I have been Googling, working through each code to see how to troubleshoot and address each item, but I was wondering, could a few of the codes be triggered by one issue? For example damage to part of the loom might through up 10 error codes? List of codes below, is there something I should be checking first before working through these one by one? Thanks

AUD-000E Microphone input Signal missing
BCM-0082 Yaw rate sensor Offset fault
BCM-0092 Yaw rate sensor Faulty signal
BCM-0093 Inclination sensor Faulty signal
BCM-0109 Communication between control units
BCM-0121 Yaw rate sensor Signal outside its permitted range
BPM-1105 Control module Configuration fault
CCM-0020 Function button Activated too long
CCM-00A1 Blower fan motor Signal too high/SignaI missing
CCM-E001 Control module communication Internal fault
CEM-1A52 Communication with DOM control module Signal missing
CEM-1A53 Communication with POM control module Signal missing
CEM-1A5C Communication with OEM control module Signal missing
CEM-1C06 Alternator Control Module (ACM) Electrical fault
CEM-1C08 Alternator Control Module (ACM) Mechanical error
CEM-8A20 Low beam left Signal too low
CEM-DF07 CAN-H low speed network Faulty signal
DDM-0022 Power window hall sensor I or 2 Faulty signal
PDM-0000 No match
PSM-E001 Control module communication Faulty communication
REM-6A01 Central lock motor switch Signal too high
REM-6A02 Central lock motor switch Signal too high
REM-6A03 Central lock motor switch Signal too low
REM-E001 Control module communication Faulty communication
SAS-0010 Steering wheel angle sensor Internal fault
UEM-0004 Siren Communication fault
UEM-0031 Rear left reading lamp. Signal missing
UEM-E001 Control module communication Faulty communication

[john langrick]

Indeed, a lot of codes!

I see a few related to alternator.

Although a much earlier models, my xc90 started to show abs and srs codes occasionally and just before my alternator failed. Because our cars have daylight running lights, it does not take long until battery is too flat to start car. It until then keeps running. When replaced just loads of error codes when re started.

Could it be that your alternator is failing and becoming intermittent?

Hope this helps

[Tannaton]

^^^ That - I would say points to a power issue resulting in periods of low system voltage - check alternator pulley first....