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Sounds like a malfunction of the radio. What methods do you have for controlling volume? Do you have steering wheel controls? The reason I ask, is that my best guess is that it's the control panel going bad. But if you have multiple methods of adjusting volume, then it tilts toward the main box.
But I would try a total reset first. It's a lot cheaper.
But I would try a total reset first. It's a lot cheaper.
