Customer came in with an issue of stalling after 15 minutes of driving. Customer brought car into shop. We hooked up a 4 channel scope measuring signal for crankshaft and camshaft sensor. after 15 minutes of idling crankshaft lost signal but cam sensor still has signal. Stalled shortly after. We checked wiring from Crankshaft sensor to computer and found it to be okay. Replaced Crank sensor and problem is fixed. We recommend replacing camshaft sensors at the same time as they fail with similar symptoms and Check engine light on.