Last week I had to jump start my l3901 after a light had been left on. It started right up with the jump (was jumped per manuel instructions), but now I have a P0606 code. The battery and alternator tested good. I even disconnected the battery twice and let it sit overnight but the code is still there when I restart it. All the wiring looks good and the tractor is kept in the garage. Is this code something the dealer is going to have to reset? Thanks