I have a 2002 Nissan Altima SE 3.5. About a week ago, my car stalled when driving and would not start until after waiting about 15 minutes. Check Engine Light came on. Did a diag test, and showed a PO340. Bad Camshaft Positioning Sensor. I replaced it. Problem still exists. But this time I show "NO CODES" with my diagnostic tester. Car starts when cold but after driving or idling on driveway for about 25 minutes, it stalls. Checked for codes and again shows "NO CODES". Check Engine Light did not come on. After letting it stand for about 15 minutes, it started fine. HELP ME IF YOU CAN

Coolant temp sensor maybe? That sounds near the same problem I was having in my s12 I replaced that and all was fine...