I got a tank of gas at a different gas station and it was 93 grade but the check engine light came on the next morning.I read the codes as 0505 which says "No Failure Recorded/Detected"

Does this mean everything is fine?I had checked the K and o2 sensors recently and they are fine!!

Why did the light come on?? any ideas

as always,
TIA
jay

 

Next time, please do a search, this has been discussed before. In fact, it was mentioned earlier this week.

It's a "all clear" code. Everything is fine. Reset it and go on with your life.