Anyone have random stereo volume fluctuations?

do you have volume buttons on your steering wheel?

Sometimes the clockspring cable wears out resulting in odd behavior from systems that are controlled via steering wheel buttons.

 

There is an "Auto Sound Levelizer" that adjusts the volume based on speed. I've also noticed it jacks up the volume when I set it to Park. There are some options on the multimedia screen for changing that. But that's probably what you hear.
EDIT - nevermind, just noticed you said you turned that off.

 

Keeping your profile up-to-date can minimize this sort of confusion.

 

I don't know of one, sorry. Old forum software has real limits.

On the other hand, two Priuseses seems like a nice problem to have

 

Are you using a single source when noticing the fluctuations, or are you switching between sources? I've noticed the system isn't great at equalizing volume between sources with significantly different levels. (For instance: streaming from your phone sounds fine, but the system blasts you when you switch to OTA radio.)

 

That does not seem “by design”.

 

To be clear, is this happening with just one station or several?

Had this happen with one of my presets. Could be the station, but I think solar weather has been quite active in the past few weeks. That can effect radio signals.

 

Oh no...good old Toyota mulitmedia bugs!

My 2014 Tundra infotainment system would spontaneously freeze up or just randomly reboot itself....even lock up while I was talking on the phone via the speakers. Had dealer check it out and was told they are "buggy" but to watch for TSBs on them. (Didn't see any)

A couple of years later (and many many reboots), Toyota had a software upgrade which I downloaded onto a thumb drive and installed (NOT an easy process...also very buggy) but it finally took and now it seems to be working as-advertised. Good idea to periodically check what version is out and update as-needed.

This is the link to see if your car has an update available:

Updates | Toyota Software

 

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I disabled auto-level as well, which helped, but I still notice it from time to time. I'm mostly streaming music via wireless CarPlay. I haven't been annoyed enough to actually try to isolate if it's only certain songs or if it only happens with CarPlay. Now that you say you notice it with the radio I guess I can eliminate blaming my phone. Since you didn't notice it while listening to an audio book, maybe the sound system is just not very good at certain frequencies.

 

I disabled auto-level as well, which helped, but I still notice it from time to time. I'm mostly streaming music via wireless CarPlay. I haven't been annoyed enough to actually try to isolate if it's only certain songs or if it only happens with CarPlay. Now that you say you notice it with the radio I guess I can eliminate blaming my phone. Since you didn't notice it while listening to an audio book, maybe the sound system is just not very good at certain frequencies.

 

Is your phone bluetoothed (is that a word) to the car? Our HyCam AND my new Prius lower the volume when we get text messages (for that matter any notifications) on the phone. Even notifications that don't display on the car display. It just dips for a bit and then goes back to normal.

 

I my case it's a much more subtle decrease in volume.

 

Mine too. At lower volumes you barely notice it, but if you have volume above 35 with more bass, the change is drastic. I haven't noticed it with audiobooks, but spotify is terrible.

 

The only thing I've noticed is that AM stations seem to be much quieter than FM for some reason.