FYI cleaning the MAF can be done with any of the OTS carburetor/intake cleaners you can pick up at the auto parts store. I prefer the Berryman B-12 as it evaporates completely. But as Bill said, the MAF sensor shouldn't be dirty enough to cause errant readings on a vehicle that new unless you were doing donuts in the dirt without the air filter installed (not to mention, like Bill said, the fuel trims would be opposite).