I just bought my 2010 Forester two days ago. It has about 90,000 miles on it. I filled the tank up with unleaded last night, and after driving about 20-30 miles my vehicle dynamic and engine light came on, with the cruise control blinking. I took it to advanced auto, and they ran the diagnostic tool and it read P0420 and he suggested a fuel additive seafoam. I bought and added it, and the lights went off, however, now every time I come to a stop, or almost stop, my dashboard lights up with the AWD, Oil temp, dyanmics, the sport, and another light. They blink on and off. Can someone tell me what may be going on?