After installing the injen cold air intake on my 2015 1.8 I get code P0443 purge control valve circuit. The kit claims to be pre tuned and what I've seen so far normally a lean or rich code would require the tune. When I reset the code it runs great and gets Awesome gas mileage. Once I turn the car off then back on the car throws this code and the mpg seems to dwindle a bit. Still better mpg then I started though. Any ideas or suggestions ?