2009 Cobalt w/2.2L with 203,000 miles. It was about 25F and I remote started the car this morning. All is good. I jump in, drive about 4 miles, mostly highway and stop and turn off the car. I run into the post office, pick up a package and come back out and start the car. I turned around and head back down the highway at about 55mph. Suddenly, the car feels like it is running out of gas and I look and the CEL is flashing. I slow down a bit and get ready to pull over and it stops flashing and car starts running normal. I drove another 7 or 8 miles and stopped and filled up with gas. Drove back home and checked the codes. I got P0300 and then cleared the codes.
I don't think the gas was the issue, but I was a bit under 1/8th of a tank when it happened. I filled up just to make sure.
My question is: Am I looking at a problem that is going to come back or was it probably just a glitch or one time issue? Does anyone know what might have caused this? I haven't had any problems before other than a VVT valve or some such went bad and I replaced it. That was a couple years and about 40,000 miles ago. I also get a Too Lean or rich condition (I forget which) every so often, but changing the air filter usually solves that and it hasn't happened for six months or so.
Any thoughts, advice or help is appreciated.