infrequently the radio codewill have to be reset after stalling. Lastest advice is to replace ignition switch, battery is fairly new, cables and positive feed check out, new alternator. Also, have been advised that the ECM may need replacing. had dealership reset codes, ECM-25, and flash the computer.Recently, had codes for mass flow sensor and throttle position sensor. Called a tech at Auto Scandia in Herdon Virginia describing problem that's existed for two years and he didn't hesitate when hearing radio code has to be reset ocassionally... replace ignition switch