I got a new head end installed and my gas consumption guage was constantly fluctating. My dash would go dark and my back up cam would not work. I found a youtube video that described a fix for dash cams and back up cam. off. It worked and now not only are the dash lights and backup cam working the fuel consumption is working as well.
First... Before I even read your post I want to give you the greatest priuschat post title award! It's not really an award, but in the decade I've been on here no one has ever been better at click bait than you! Thank you for teaching us the ways of getting more attention!
My garage door didn't open one day so I turned on my shower. Next thing you know, I hit the garage door button and it opened. @B nason , my recommendation would be that you do a search for "combo meter" problems. It's pretty well beaten to death as to the cause and true solution.