We have just started having
We have just started having a similar problem.
We live up a 3,000 foot mountain and the Prius has always been fine... getting a bit louder as the lawnmover engine stretches its legs, but still able to go at 55 uphill.
Recently, we have had the battery meter go down to 1 (purple) bar fairly early on in the climb and then it does not seem to recharge at all even in periodic dips and the engine revs without any extra power actually hitting the wheels. No warning lights at all. We can maybe make 45mph if we are lucky. It sounds and feels like the clutch is slipping and I suppose it is possible if the CVT belt is loose or summat.
Did you ever get this resolved and how much was it ?
I located a site showing a
I located a site showing a disassembled Prius engine. It shows it having a clutch and pressure plate. I'm not able to find any other references to these parts on other sites. While, if really part of the Prius drivetrain this would explain the slipping, I cannot confim these parts are in a Prius. Here is the site I'm referencing: http://priuschat.com/forums/gen-ii-p...ne-reseal.html
At the bottom of that link,
At the bottom of that link, a guys says the drive plate that buffers pulse loading from the ICE to the drive train has known slipping issues. It's kind of like a clutch. That might be what you need to have checked out.