hey guys I just bought my 05 sedan two weeks ago and pretty much immediately after, the engine light came on, at first there was only code P0171 for the engine running lean but before I got to troubleshoot it, the light disappeared for about a week. however today the light reappeared but with two codes, P0507 and P0171 and I'm super worried, I did do some 0-60 tests and some donuts in the last two days, do u guys think those are the reasons for the high idle rpm? any suggestions would be great!

 

I'd start by checking for a vacuum leak.

 

Welcome to G life, time to learn a lot! Listen to that guy ^^^^^