Codes P1259 and P1399

This is the most impressive car I have been in. 130,000 miles and zero issues, until it sat for eleven months. New battery, brakes, rotors, spark plugs, changed oil before turning it over, car never missed a beat. Drove it every day for a month even a few eighty mile runs for a concert. Yesterday on my lunch break at work I took her to get smokes and upon parking in the same spot that I left the dreaded engine light twenty four hours before the inspection appointment. Autozone scanned and found p1259, and p1399 with no information. Too bad four hours on Google and I am still with no information. Car has a slight hesitation and low idle but still drives and is able to rev up if I floor it. Please if any one has even the slightest clue where I should start. Help!