I have a 2007 MDX that I purchased used in August of last year. It has a little over 120k on it.. today my gas was low (not ridiculously low) but enough to have my light come on. Anyways. I got gas, and drove it 20 mins, and then on the highway the emissions warning came on. My car is running fine, and I read it could be the gas cap. I tightened it, restarted the car a few times and it’s still on. I’m leaving it overnight, and hoping it will clear on its own.. I also read it could be an O2 sensor, or catalytic converter..does the extreme cold have anything to do with this? The car seems to be running okay..