Just had mine in for warranty service before it ran out...one of my issues was difficulty starting when warm. If I stopped to run into a store, it would take 15-20 seconds of cranking to finally start - no lights or codes. The dealer said it was the fuel pump-they replaced it and the fuel filter. It has been 3 weeks since I got my car back and I can safely say the problem has been fixed. It lights off after 2 or 3 cranks every time now, no matter the temp or how long it's been sitting...