I have 2005 s40, check engine light came on, code ecm130a maf sensor, and ecm-250a long term fuel trim, tsb from volvo is taking about ecm flash part number 30668282, my current flash is 30668555, can any one can check if I need this flash up date, my local dealer wants over 200$ to check , my mass air flow sensor at idle is reading 3 g/s, can any one know good reading should be, my maf sensor was all ready swap, no exhaust leaks found, no intakes leaks found, please help.