So this issue just started happening to me the past week or two. Whether i use the button on the door handle or key fob to lock my vehicle, it does not lock. Usually I know its locked when the mirrors fold in and turn signal blinks but lately theres no lock response and then the horn chirps twice to let me know it didnt lock. Same thing happens when i use the key fob to lock. The only thing i could do to remedy this problem was to start the car (accessory, not the engine) and then turn it back off and lock. Any ideas?