So my 09 g37 s would randomly have a check engine light turn on showing the code p0300 (random misfire) and it would only turn on in cold snowy winter days. As soon as temperatures reach over 50 f it turns off. I don't drive it in the snow cuz its rear wheel drive and I live in a mountainy rural area where snow isntcleaned all the time in the winter.

So this year once the cold came in the check engine light turned on just like before. but this time I wanted to get at it and fix it and took it to the auto zone for the free scan. And while driving there my car went into limp mode and after getting there the guy hooked up his computer and gave me these three codes. P0300 p0524 p0020. Does anyone know if maybe just one of the codes can be causing the other two? Or all 3 can be different? And did anyone have anything similar. Can you guys help me figure out what I can do to fix it

 

 

ok thanks. I'm new here. Didnt know where to post what