I'm going to try gas from another station that I normally would never go to and tighten as much on the outside as possible. I checked under the hood, under the car and in the trunk but see nothing out of the norm.

 

Mine only showed the blinking fuel cap light. No codes.

 

I think this problem is only confusing because after correctly tightening the cap (helps to grip the outer ring) there is a time- or mileage-based reset period. I only had this problem once, but it took a solid 2 days to reset on its own.

 

There is a logic sequence for the ECU to determine an issue. I went through it a year ago so my memory is not spot on. The fuel tank has to be between a certain high and low point, you need to drive for 20 minutes, temperature is an issue, and I recall the speed must be some relative constant.

It is possible for another leak to be present and not just the fuel cap.

 

I've searched but not been able to find any other leaks in the system

 

is there a way to check/clear the code with flashpro and a laptop? I got the issue for the first time yesterday evening, i have a MY06 and the odometer screen just displays "check fuel cap"