2011 Panamera V6 P0302

[stphnsns]

Hi guys, as stated above, 2011 V6 970, new to me, with 113,000 miles. Great condition, and drives great 95% of the time. On occasion (& seemingly when warm, after a longer drive?), typically when idling in park, I will get CE light, accompanied by PSM failure. Also, one time, got "auto start/stop failure", but I have since disabled that, so it doesn't pop up anymore. Durametric (actually POR icarsoft unit I travel with) showed only codes for P0302 and sport mode failure. Interestingly, if I turn the car off for a while, and restart, the codes will go away on their own. Anyway, sensing the issue was with cylinder #2, my mechanic replaced the plug and coil for that cylinder. We noted that neither looked bad, and no visible cracks on the coil. I also show "coils replaced" on a carfax report from back at 82k miles. Unfortunately, i didn't get any other service records or history from before my ownership, as I bought from a dealer. Car ran fine for a week or so, then got the issue again. Still showing P0302. So, I'm wondering what's next? Possible clogged/gunked injector? I put in a bottle of Techron, but the tank was 3/4 full. I'm waiting to run through the gas, to maybe add another small bottle when close to empty. I'm hoping its nothing more serious, as the car drives great and seems to have full power a vast majority of the time. I've put about 600 miles since purchase, and the issue has popped up, I think 3 times. Did it last night, after about a 40 mile drive (interestingly this time it did it after the car had been shut off for an hour or so), so I ran the codes, but did not clear them. This morning, on its own, CE and other warning gone. and car ran great. Any advice or input, as always, greatly appreciated!

[stphnsns]

In case anyone sees/needs this info, today the issue returned after a 60 mile road trip. I could not get it to resolve. Needing to drive home, I began experimenting with things, and hit the sport mode button prior to starting the car. The car then started in sport & everythig was fine - all the way home. I even took it out of sport & all stayed good. Ran like a champ. Happy for something of a temporary solution, but confused for sure.