Hey all! I have a question relating to a code I had pop up when i bought my vehicle a while back. When I had the CEL light turn on I went and scanned it and it showed p000d. When I bought the car it had 52k miles on it. The code went on and off throughout the first tank of gas and when i filled up next it never had came back on. Now at 64k miles. My question is since the code has gone away is there anything to worry about? I have a feeling it popped up because of bad gas or the wrong octane the dealership put in when i bought the car. Am i safe or should i worry? Code last popped up 9,000 miles ago for reference and never has shown up since. Thank you!