P0446 - Vent control malfuction

Ok,

I've searched. Can't find it anywhere. Got a CEL P0446 that keeps coming up. Where is the vent controller and how do I replace it!?





Any info would be greatly appreciated. Part number, location of part. Or anyone else that's come across this before? Seems to be fairly Uncommon.

Thanks in advance for any help!!

Cheers