Hi. As the title says my car will occasionally stall right after I let go of the key. It sounds exactly like it does when it starts, and will start and run normally when I turn the key again. It has new plugs and a new Pcv valve. There are no codes or drivability issues. The security light doesn't flash either. I saw elsewhere where people had issues with the security system. Any ideas as to what it might be? It's a 2011 Eco automatic with 60,000 miles. Thanks in advance.