Thanks, and I'm also late replying here! I solved my MAF high issues as well, it was simply a poorly seated/clamp hose into the inter-cooler (the rubber pipe that comes from the OTE into the IC - it was not properly clamped and seemed to only leak air under vacuum or off throttle, hence a pressurize...

Hi Richard - I’m chasing down what seems like identical symptoms (same DTC ecm-120C, high maf at idle, no boost or vac leaks, many new parts including new MAF as a last resort) Mine is a 2006 S60R and I’m ready to chassis-ground pin #3, before I do it I’d like to find out your experience after a yea...