Usually I put the FOB in my pocket, turn the key switch on, hit the start button and it will fire right up. Recently though the lights/hazards flash and nothing happens. I changed the battery in the FOB but that didn't help. I can get to start but I have to put the key in it and move the switch to accessory then back to start or some combination like that. Anyone had a problem like this? Where should I start checking? Thanks...