"hybrid system malfunction, visit dealer"- 2016

Car could have sat to long and depleted the HV battery. Prii like to be driven low image kills the HV battery.

 

I would get the trouble codes read before taking it to the dealership. Try local auto part stores.

Posted via the PriusChat mobile app.

 

That message covers a large number of different actual trouble codes that the system can report. Some are big-ticket items and many are no big deal and easy to resolve. It probably has nothing to do with you getting any sequence out of order, and there's no real reason to get too worked up about it until the actual codes have been read. Then we'll know something.

 

I'm in favor of having something on hand for reading trouble codes, so you can do that whenever they come up, without having to rely on the kindness (or paid services) of strangers.

I don't belong to the "just assume it's a quirk" school of thought. Pretty much any time my car gives me a warning, I will read the codes to see what it is warning me about. Once I know that, I will decide how urgently to treat that particular issue.

 

I had a similar experience almost 8 months ago described here with our 2017, but no issues since. My confidence in the car has almost grown back to what it was before this happened, but like you, I still have more confidence in our Gen 2, despite its ongoing issues (intermittent failure of Combo meter, constant Check Engine light now for P0430).

 

Really, any time there is a warning light, and then it goes away before you could get the codes, the limit of what you can safely conclude is that something was reported and you missed the chance to find out what (unless it has been saved as a history code). You might get another chance if it comes back, and usually if I miss one chance I will try to be a bit extra alert and ready for it if I get another.

The detection conditions for some codes are such that a good amount of time might pass before you get that next chance.

 

Umm, what turned out to be the cause of that? Was that connected to improper workmanship doing the column shaft recall?

 

Cold weather certainly wasn't the cause of my "Hybrid System Malfunction" error (it happened in Florida in late April), but as was pointed out, that error message can arise from a lot of different conditions, so it's not likely your car was experiencing the same issue as mine.

 

Bonjour
Je voudrais dire que j'ai eu le même problème par - 10°c . Le moteur thermique n'a pas voulu démarrer. Et j'ai eu le même message qu'il fallait se garer le + vite possible et aller chez le concessionnaire . Après avoir éteint le moteur 2 fois, il a bien voulu redémarrer avec un message d'erreur que j'ai réussi à faire partir avec un lecteur OBD 2 .

 

THIS FORUM WAS THE FIRST THING THAT POPPED UP WHEN I SEARCHED HYBRID FAILURE VISIT DEALER. THANK YOU
I just had this happen on my 2017, I was in a very mode area looking at a piece of property. Went to start the car and the dash lit up like a Christmas tree hybrid system failure brake failure emergency, blah blah failure visit dealer visit dealer.
Fortunately, the car still turned on so I drove it to town and pop the hood never had an issue. One owner 65,000 miles.

Looked under the hood and scratched my head and noticed the negative terminal on the main battery didn’t look like it was set it on the battery itself correctly

So I touched it, and it was wiggly and loose

I have a of tools never carry any in the Prius. Drove to an auto parts store asked to borrow at 10 mm socket tried to tighten the battery without any luck noticed under the terminal there was a felt donut to prevent corrosion, preventing the terminal from sitting down all the way.

Removed the felt donut tighten terminal correctly. All codes cleared when I started. The vehicle drove 1000 miles no issues.

Vehicle is always been dealer serviced no idea where the felt corrosion preventer came from. Perhaps it’s factory haven’t checked.
Love the car it’s been excellent. First time I’ve ever had an issue your results may vary

 

The felt donut is fine to have. The problem was the nuts and bolts on the terminal clamp weren't torqued to spec and they loosened over time.

 

well, I just ran into this just now. I've been driving it a couple of times within 8-mile trips with no issue. I was at home, and about to drive off again and was hit with this same error, but it did not let me start my car. My software engineering side of me decided to try out restart trick. So I did not had time to try and diagnose looking up DTCs. I was in a hurry, rushing to get the car drivable. I noticed my negative terminal was loose just like a previous poster mentioned with their car. I tightened it back down and everything was working. I went through my errand picking up my kid from school. I tried to look up any noticeable error codes, and nothing stood out. I'll chime in back here if I noticed any other parts unusual, but for now, I'll assume it could have been a loose negative terminal. The weather seemed to have gotten much warmer, but could be mixed with that and time which it got loosened.