About once or twice a day, my radio will go up by one notch (from 88.1 to 88.3) when I start up the car.

As in I have it on 88.1 when I turn it off and when I start it up it is on 88.3 (fwiw I have XM and its on a modulator)

Only sometimes, and the biggest pattern I can find is that it happens when it's the hottest part of the day.

any one know why?

 

I have no ideamine does that too, but not for long I just got my navigation and I'm going to install it soon.

 

mine does that too. i think its just a power surge from the battery upon starting....wouldnt worry, its not hurting anything whatever it is.

 

Mine does it too. It seems to happen after I start it to come home from work after the car sits for about 8 hours. Doesn't seem to do it in the morning though after the car sits for 12 to 14 hrs. It did it today and the high was only about 55 degrees

 

interesting to know I'm not the only one!

Thanks