I have a 05 Magnum AWD 3.5L, as I am driving the car will start running eratically and the throttle light and the ESP/BAS light come on. I turn the car off and restart and it runs fine. It will do this repeatedly but evertime resets with a restart. After several times the check engine light will come on and stay on, even after a restart.Anybody have any ideas? My mechanic has checked it out and says that there are no codes in the computer. I'm baffled