Help: strange warning light combo: dangerous?

Does it drive properly?

If not, what is not acting right?

The hybrid and brake lights are the most concerning and worth a proper scan. You could have them reset and see what comes back. Serious hybrid problems won't let it drive properly if at all. Especially if its inverter based. Serious brake problems usually means the brake actuator and booster assembly, a known issue with these models. But it will drive.

The brake problems can throw the hybrid lights as well as the brake actuator is part of the hybrid regen process.

While many would blame the 12v or at least suggest replace the 12v battery, I don't subscribe to that theory if it drives. Obviously if its the original 12v battery, its time, just as one might replace eight year old tires if they were original. On these cars, scanning with a very good code reader is usually the first order of business.

 

maybe a low 12v, have you been driving much?

 

I would just skip the tea leaves and read the trouble codes. The lights mostly light up to let you know that there are codes to be read. Trying to glean more from patterns of which lights come on is a long run for a short slide, because the different computers in the car talk with each other too much, and will put up lights of their own because of problems they heard about elsewhere.

That will all sort itself out when you have read the actual codes. You'll find there are codes described in the manual that literally just mean the computer reporting the code is telling you it heard about another code from another computer.

 

You might try disconnecting the 12v battery for a few minutes to attempt a code reset and see what comes back. If you wait until things are relaxed again it could be next year. I would do something rather than run around with hybrid and brake codes. They can be major concerns.

 

Do you have anything plugged in steadily to the OBD port. That was apparent cause of somewhat similar problem with our 2010.

 

you have a battery under the hood?

not driving = low 12v

 

If you are going to buy a charger, it should be a "tender" type automatic one......NOT a dumb trickle charger.
The difference is important.

The 12 V system runs the computer boards in the car.
If that power supply is low, all kinds of strange things can happen.

The onboard charging system is designed to keep the battery charged; not necessarily to REcharge it if completely dead. It might take many hours over several days to fully charge it.

Unless there is a bad connection on a main cable, the jump points are fine for most battery operations.

Hopefully the codes will clear themselves......IF the battery really is the cause.

 

The often told story around the Prius Chat campfire is that a low or failing 12 volt battery, morphs into a gremlin that can cause any number of codes, etc. The 12 volt boots up the computers.
So often when someone reports a mysterious appearance of codes, check your 12 volt is an early refrain.
On a 2012? It's probably a good first step.

 

12.4 V is too low. Get a battery tender and charge the battery for 24 hours. If not up to 12.8 v or above after that, change the battery. If it were me, I'd charge the battery on the top-post terminals, not through the jump-starting terminals.

 

I installed a battery tender pigtail from 12V into cargo compartment for just such occasion, since the v often goes a month between road trips. Pigtail also has a battery status LED.

 

Read the trouble codes. At 12.4 volts they are not fake or caused by gremlins. They are your car trying to tell you about an issue. Read them.

 

12.4 does NOT indicate a healthy battery, especially right after being charged.
Before you do anything else, you NEED a new battery.
This is assuming your meter is accurate, of course.

 

Maybe not. IF his 12.4 reading truly was with absolutely no load, then it might well fall a lot more during the "boot up" process when a load is applied.

 

Not enough to invent 'gremlins' or continue playing games other than reading the codes his car is giving him.

 

You have absolutely, positively NO way to know that.
And implying that it is a fact is NOT being responsible.