Brake Warning Light, ABS, VSC, Master Warning Light

Happy Thanks Giving to all!!

Apparently my 2008 Prius decided to tell me in it's own way the same thing by showing me these lights this morning.

So they turned on while in a drive through, around the corner from my house. All except the master warning light. 5 minutes after the initial ones, the master light came on. And the braking power disappeared. I immediately got it home and shut it off..

After some research, I performed the 12V Aux battery test on screen in the car.

Confirmed -11.8v while ON, and 11.4 V when in ACCESSORY mode. So the 12v battery more than likely is the culprit for this problem.

However, my concern at this point is, in the 5 minutes it took me to get the car home thus yielding the master warning light in the final minute, in your opinions, could any serious damage have been done to the computer components or anything else?

I won't be able to replace the battery until hopefully tomorrow if the dealership is open. But in the meantime, I'd like to hear your thoughts.

Thanks guys,

Happy Holidays!

 

Thanks for the response as always Patrick.

The car has sat for a while, I went out there and did the voltage system check, it dropped to 11.3 upon Ready mode initiation. Then the voltage tetered from 14.2-14.3.

Only the master light remained on this time, the other lights are now off although I suspect they will return.

I let the engine run for a bit --edit-- apparently I was looking at the wrong coolant, ill edit again in a moment.

Yes, there was turbulence in the inverter coolant reservoir as far as I could tell. Slight movement of the liquid looking through the cap-hole.

 

After putting in the new battery, all the lights went away, I've drove about 100 miles and they have not returned.

I'll update this post if they do come back.