I'm having an issue accelerating my 2006 Outback. This issues has been a minor sputter for a while; when I accelerate, it just doesn't seem like it's getting enough gas - it sputters, lurches, etc. until it comes into it. I've ruled out bad gas, as I have gone through a few tanks and the issue persists. Recently, it has gotten worse, to the point where it bucks hard in first and second gear. CEL code is reading P0131 & P0037, which has something to do with the 02 sensor. Could this affect the gas intake? Any thoughts?