Oh boy. First of all, I hope you and yours are staying healthy. Like many here I'm sure, I've been working from home for the past couple of weeks. As a result, since 3/13 my 2012 C4 has not been driven its usual 88 mile commute every day. I have taken it out a couple of times for a short errands during this time and when it's been a few days between jaunts, I at least start it up and let the engine run for several minutes. Last time I filled it with gas was the 12th and it's been about half full until I finally decided to fill it up today while I was out. Well, when I first started it up to take it for errands today, the CEL was on. First time ever that I can recall. I had just done an oil change about 4k miles ago and the oil is still full (I checked). The car seems to be running fine. I ran a test with my OBD2 and it's showing P0455 and P0441 indicating a large evap leak. It would be nice if it were a simple matter of the gas cap, but I'm doubtful since as I said the tank was half full and the light never came on until today. For the heck of it, I removed and checked the gas cap and it was fine, so I resecured it. At the rate I'm driving lately, I won't get a full drive cycle in for at least another week probably. And coincidentally, I have one more payment left on this thing and I was hoping to drive it forever (it has 144k miles on it). Assuming the CEL doesn't go out on its own, what's my next logical step short of bringing it to a dealer? I really don't want to have to do that since it's always the most costly option. Thanks in advance for any and all advice.