Hey guys, so I'm trying to figure out which route I should go with first. On my 04' 2.5L w/130k I am getting engine code P1443, P0464, P0420. Any advise on which to tackle first? Car doesn't have any drivability issues and I get roughly 24-27mpg depending on driving and my fuel gauge is accurate. I tried deleting the engine codes to see which would come first but my scan tool for some reason won't let me do it on the Subaru, it keeps yelling at me saying the engine is running which its not. I'm personally thinking of starting with the tank and tackling the 464 code and then the 1443 and then if the 420 persists then tackle that. What do you all think? Or any words of wisdom before diving in?