B&O issues

[goodbuzzman1]

Hi.
I’m having a bit of bother with my B&O soundsystem in my 2015 S3

Sometimes my subwoofer is working and sometimes it is not. It never cuts out while it’s on, it just isn’t on sometimes when I fire up the car.
Also according to my VCDS scan, the two rear treble speakers are suffering from the same problem.
Is this looking like an amplifier problem?
Here’s the scans

Address 47: Sound System (J525) Labels:* None
Part No SW: 8V0 035 465 A HW: 8V0 035 465
Component: MIBAMP1ALPINE H11 0370
Serial number: AUZ8ZAD0900C3VO
Coding: 01030300AAAA2AAA01
Shop #: WSC 06385 790 00016
ASAM Dataset: EV_AMPMst16C1ALPI 004024
ROD: EV_AMPMst16C1ALPI_004_AU37.rod
VCID: 366312D78935133B29-8062

3 Faults Found:
0604 - Loudspeaker 1 in Double-Subwoofer
B130C F0 [143] - Short Cricuit
MIL ON - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 6
Fault Frequency: 33
Reset counter: 49
Mileage: 97083 km
Date: 2021.06.23
Time: 12:59:21

0537 - Rear Right Treble Speaker
B1068 13 [143] - Open Circuit
[New feature! Extended UDS fault detail is only supported by current gen. interfaces]
MIL ON - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 6
Fault Frequency: 33
Reset counter: 50
Mileage: 97083 km
Date: 2021.06.23
Time: 12:59:21

0532 - Rear Left Treble Speaker
B1066 13 [143] - Open Circuit
[New feature! Extended UDS fault detail is only supported by current gen. interfaces]
MIL ON - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 6
Fault Frequency: 33
Reset counter: 50
Mileage: 97083 km
Date: 2021.06.23
Time: 12:59:21

 

[DJAlix]

Errors report as possible wiring issues but could also be the amp. Passenger side carpet wet, any works taken place in that area?

 

[goodbuzzman1]

Errors report as possible wiring issues but could also be the amp. Passenger side carpet wet, any works taken place in that area?

I would have thought if it was a wiring issue/dodgy wire I would sometimes here the sub kicking in/out while music is playing.

as it stands, I could go for a drive and have full sub action, next time I go for a drive, zero sub action, but it never cuts out when it is working

 

[DJAlix]

I would have thought if it was a wiring issue/dodgy wire I would sometimes here the sub kicking in/out while music is playing.

as it stands, I could go for a drive and have full sub action, next time I go for a drive, zero sub action, but it never cuts out when it is working

Yup, hence my answer

In basic terms you have wiring related errors but in reality you need to look at the connection end to end:

speaker > female pin > male pin > wiring loom > female pin > male pin > amp (and all the individuals modules / component inside that make up the amp + Software layer)

Sound like one of the in-line components in the amp is on the way out hence why the errors are manifesting as Open Circuit ie broken / disconnected wire (in its most basic sense).