Anyone know which speaker this may mean? I'm hesitant to remove my all door cards if I can track it down from this code. I did notice one of the ones on the passenger side was cutting out, but I wasn't going to attempt to work it out while driving down the M1 this morning. 
07 Supercharged - Still breaking her in!

Boot soundproofing part 1 - http://www.fullfatrr.com/forum/topic15612.html
Custom exhaust - http://www.fullfatrr.com/forum/topic15296.html
18" wheels for Brembo equipped cars - http://www.fullfatrr.com/forum/topic15052.html

I have this fault code and in my case it seems to relate to the rear upper door speakers, after removing seats looking for chaffed wires and generally messing a closer listen reveals (after a reset with IIDTool) that there is a little tizzy sound coming out of the upper speakers but the bulk of the sound comes out of the lower ones. Anyone else had this - it's not urgent as the sound in the drivers seat is just fine but I guess I should fix it  Geoff

Have you managed to remove you tow ball yet Geoff?

I had mine returned to the dealer with both the left and right exhibiting the same symptoms, and IID reporting them both faulty.

Dealer informed me that this was normal and they were actually passive tweeters on the Logic system. It all sounds OK, I.e. no loss of treble when sitting in the back.

I did have the seat out lookinging for chaffed wires, but all was fine.

Still don't believe the dealer, but can't prove otherwise

47p2 wrote:

Have you managed to remove you tow ball yet Geoff?

NO  Geoff

With regard to the tweeter issue - what do others have coming from those speakers (top ones in the back doors).

I don't know what a passive tweeter is - its probably me - given that I have a Twitter log on and I don't use it  Geoff

I'm gonna bump this - please have alisten to the upper rear door speakers and feedback and report if it's a faint tizz of a sound (which mine is) or a full bodied sound which I suspect it should be.
Thanks Geoff

Mine is a faint tizz sound.