When you try to adjust the radio volume with the dash knob the volume goes nuts; it usually goes to ZERO as soon as you touch it, then goes 0,1,2,3 (or maybe higher) then back to zero as you try to turn it up. End up having to use the volume control on the steering wheel.
It's been this way for at least the last 25,000 miles (now 46,000 and out of warranty). The dealer told us they'd never heard of this (yeah, right, seems like it could be a common issue) and wanted the car for a few days... so we never did it.
I Already found a thread about changing the car battery for a similar problem, which I'm kinda hoping I don't have to do? Since this is not exactly the same I figured I would ask. Though some said the OEM batteries are junk and can fail without notice...
I also saw a suggestion to take the knob off and blow compressed air - tried that.
P.S. - is there a way to turn on the radio without having the engine running? Back in the day, we used to turn the (now non-existent) key to "accessory" position.