hmmm What kinda car is it? My guess is it could be a weak connection with your ecu and its adapter. Also it may be your battery or alternator. I know in the cold weather your battery loses half it's strength. Under cold conditions the repeated stress put on the electrical system can reduce the voltage from the ignition system. Hope this might help. I am really leaning to battery issues in the winter. The colder your winter is the more demand your car's battery will be put through.