2014 Prius V loses hybrid charge overnight

You have got to love the service recommendations. Typical dealer up-sell nonsense.

 

The dealer will not be reimbursed by Toyota for work that is not clearly identified as warranty work. They need to have a clear indication of a failure. This is generally an OBD code or or a failure noted in techstream.

I had a VW with a failing component covered under warranty. When I read the code my reader reset it. I had to wait for the code to reappear to get it fixed under warranty. This is very typical.

 

what i'm asking is; did the service manager look at the number of bars when you dropped it off, and again in the morning?
and if so, what was his explanation?

 

I see that you're in Florida. That's a pretty broad area. Are you in or near Tampa? You might check with Todd at Home - Tampa Hybrids Inc. (@TampaPrius.com). If you're close by, he's a fantastic resource. I can almost guarantee that he can figure it out.

It does sound to me like the hybrid battery is out of balance. That one snapshot reading of the cell voltages isn't the whole picture. But until it throws a code, it's not a warranty issue, as has been said.

 

You can clear all codes including stored codes, but you don't have to clear codes after reading them. My mistake is that I hit the wrong button on the code reader and cleared them. At the dealer, for the case of my exhaust flap problem, the TSB from VW specifically required both a check engine light (which you won't get without an active code) and one of a few codes set.

 

yes, they can run many ways, independently and in concert

 

can you make a recording of the rumbling?

 

I think a drive with a camera recording the dash in movie mode is needed. I'm presuming that there is no history of anything not installed at the factory ever being attached to the car. No relationship strife.

 

EV mode is ok at speeds, it just means you are not using the engine at that moment. The rumbling like a helicopter does not sound good. While driving, it normally is almost impossible to hear the engine except under high loads like going up a steep hill or using maximum acceleration. Those conditions cause the cvt transmission to effectively gear down, sort of like shifting to second. You will hear the engine rev up but its clear what its doing.

The engine and electric motors do have to stay perfectly synchronized to work, if not they will make a racket. If the hv battery still discharges quickly it has a problem. Consider test driving another Prius so you know how it works and sounds. Accelerate hard at speed during the test drive to hear the engine rev up. Other than that, you may have to wait for a code. Just keep an eye on your warranty expiration.

 

First, the factory warranty (better than a dealer warranty in every respect) covers the hybrid system and battery for 8 years and 100,000 miles. That is the warranty to watch. Be sure Toyota has you listed as the owner and recalls, etc are sent to your address. The factory warranty costs nothing extra. Dealer extended warranties are often limited warranties backed by third party insurance companies. They are not worth much.

Given you have low miles and a few years to go on the 8 year hybrid/battery warranty, I would drive it for awhile and see if it gets better or throws a code. If someone reset the codes when you bought it or perhaps more recently, it may take awhile for it to come up especially if you are just doing highway miles. Stop and go traffic during the summer is the hardest on the battery as it will discharge more completely and will get hotter. On the highway the hv battery will stay charged pretty easily.

 

It's like seeing a movie without its end .
How did it ended ?

My guess is that your hybrid battery was bad and codes were deleted befote you bought the car.

This can only delete them temporarily.
In addition I recommend on app named "torque pro" which you can add set of prius pids, and set it to collect logs each x seconds.

You can select your battery blocks (each is set of 2 cells) voltage and resistance, hv power, 12v voltage and much more.

Notice that 12v drain battery is a simptom for hybrid pack issue as well.

I recently recovered my battery pack (replaced 3 cells), while car was parking for almost 2 weeks, new 12v bosch battery drainrd to 5v...

And keep in mind that your model 2014 has just 5 years warranty, so keep extending it (nit cost much to do it and worth it). If I'm not wrong up to 8 years in total.