just got the same code today P0300/PFFFE
I was on the way to work and at the stop light, the CEL, Crusie, and Traction Control lights all go up at the same time. The car drove fine to work, no misfire, no sluggish acceleration, nothing.
I've had the car since 2013 and i am the first and only owner of this car. I guess I'll pull the wiring harness this weekend and check out the soldering. Car is at 75k now and have done every service except the 75k service because it just turn 75k this past weekend. I was planning to take it in this labor day weekend for the 75k service but i guess now its going to end up being more than the 75k service