[m7ammed]

What is the best code reader out there? got an engine reduced light that went a way after restart. The light came on after WOT. Would like to read the code my self instead of just taking it to the dealer. I suspect the fuel pump. One thing to note I had just filled up with gas 3 minutes before this happened, the car had less than 1/4 of fuel when I filled up. So could be a one time thing, or is this not possible?