If the outside temperature drops below 45 degrees, the audio system will not work. It will turn on, reset within two or three seconds, and then shut down. To get the audio system to work again, I have to wait on the car to warm up, put the car in park, turn the car off, open and close the driver door, turn the car back on again, and then switch the radio on. During the spring, summer, and fall, this is not so much an issue. During the winter, it is daily. I can also shut the radio off at night when I pull in the driveway and not turn it on until the car warms up in the morning. It will work then, but if I forget to turn it off at night, oh well!!